Gordon Allport's Intergroup Contact Theory posits that under specific conditions—most notably equal status, common goals, intergroup cooperation, and support of authorities—contact between different groups can significantly reduce prejudice. When groups interact on an equal footing, the perceived threat or competitive nature of the relationship diminishes, fostering empathy and understanding. This reduction in competition is a key mechanism through which intergroup relations improve and negative stereotypes are dismantled over time.

In sociology, a minority group is not defined by numerical size, but by its lack of social power and its experience of systematic disadvantage or oppression. A group may be numerically larger but still function as a minority if it lacks access to political, economic, or social resources. Therefore, the term focuses on power dynamics and social hierarchy rather than simple population counts.

The Gini coefficient is a statistical measure of distribution. A value of 0 represents perfect equality, where everyone has the same income. The provided answer 'C' is factually incorrect as it describes a state of high inequality. This conflict exists because the source material misidentifies the standard definition of the Gini index, which ranges from 0 (perfect equality) to 1 (perfect inequality).

Karl Marx's conflict theory posits that social institutions, such as the legal system, education, and religion, are designed by the ruling class to maintain the status quo. By reinforcing class divisions, these institutions ensure the continued dominance of the bourgeoisie over the proletariat, thereby perpetuating systemic economic inequality.

Institutional discrimination occurs when organizational policies, hiring practices, and established norms create barriers that prevent certain groups from reaching leadership positions. In professional sports, the persistent lack of Black managers and coaches despite the high number of Black athletes suggests that the hiring processes and organizational structures themselves are biased, rather than reflecting a lack of individual merit or talent.

The 'real revolution' in marriage trends is frequently attributed to the changing role of women in society. As women have gained greater access to education, economic independence, and career opportunities, their reliance on marriage for financial security has diminished. This shift has led to a broader cultural change where marriage is no longer viewed as a mandatory life stage, resulting in a decline in the overall interest in traditional marriage.

Poverty is a multidimensional issue often correlated with systemic disadvantages. Female-headed households frequently face wage gaps and childcare burdens, children are vulnerable due to their dependence on household income, and minority groups often face historical and structural barriers to economic opportunity, leading to higher poverty rates across all these categories.

A modern definition of social class emphasizes the role of similar power, prestige, or wealth in shaping class identity, rather than solely focusing on economic ownership or natural factors. This multidimensional approach recognizes that social standing is influenced by a combination of economic resources, social influence, and the level of respect or honor accorded to an individual's position.

The World Bank uses GNI (formerly GNP) per capita as the primary metric to categorize economies into four income groups: low, lower-middle, upper-middle, and high-income. This classification helps in analyzing economic development levels and determining eligibility for various types of financial assistance and loans from international development institutions.

Research, particularly the study of the 'authoritarian personality,' suggests that individuals with this personality type are actually more prone to prejudice. They tend to value obedience to authority, adhere strictly to social norms, and often harbor hostility toward those perceived as 'different' or 'inferior.' Therefore, claiming that prejudice is never found in such individuals is factually incorrect according to standard sociological and psychological theories.