Rule: Inference from Duration. Working for the same company for 'over thirty years' is a strong indicator of faithfulness and dedication. 'Loyalty' means the quality of being loyal (giving or showing firm and constant support or allegiance). This is the logical quality being described. Options (a) 'perfidy' (deceitfulness), (b) 'treachery' (betrayal), and (d) 'enmity' (hostility) are all antonyms of loyalty.

Rule: Tone and Context. War and its 'devastating impact on civilians' are very serious and unpleasant topics. 'Grim' means forbidding or uninviting; depressing or worrying to consider. 'Grim realities' is a common collocation to describe the harsh truths of a difficult situation. Options (a) 'pleasant', (b) 'serene', and (d) 'rosy' are all positive and cheerful words that contradict the subject matter.

Rule: Vocabulary of Growth/Spread. The fact that the 'entire village was infected within a week' indicates a rapid spread or increase. 'Proliferation' means rapid increase in numbers or rapid reproduction of a cell, part, or organism. It is the correct term for the fast spread of a disease. Options (a) 'recession' (decline), (b) 'stagnation' (lack of activity), and (d) 'abatement' (reduction) are all words for decrease or lack of change.

Rule: Vocabulary for Abilities. Recalling conversations 'verbatim' from years ago is a remarkable and impressive feat of memory. 'Prodigious' means remarkably or impressively great in extent, size, or degree. It is often used to describe a great talent or ability. Options (a) 'faulty', (c) 'lacking', and (d) 'fallible' (capable of making mistakes) all describe a poor memory.

Rule: Vocabulary of Conflict Resolution. A 'seasoned diplomat' using 'calm and reasoned arguments' would aim to make a 'tense situation' less dangerous or tense. 'Defuse' means to make a situation less tense or dangerous. It is a common metaphor related to defusing a bomb. Options (a) 'exacerbate', (b) 'aggravate', and (c) 'escalate' are all verbs that mean to make a situation worse or more intense.

Rule: Logical Expectation. Raising taxes is generally an unpopular measure. Therefore, the public's reaction would likely be negative. 'Derision' means contemptuous ridicule or mockery. It signifies a strong negative reaction. Options (a) 'approbation' (approval), (b) 'acclaim' (enthusiastic praise), and (d) 'applause' are all positive reactions, which are unlikely in this context.

Rule: Vocabulary from Definition. The phrase 'open to various interpretations' serves as the definition for the missing word. 'Ambiguous' means open to more than one interpretation; having a double meaning. This is the correct choice. Options (a) 'conclusive', (c) 'definitive', and (d) 'unequivocal' are all antonyms, meaning clear and leaving no doubt.

Rule: Vocabulary of Personality. A child who 'refused' to do something despite pleas is stubborn. 'Obstinate' means stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so. This word perfectly describes the child. Options (a) 'compliant', (b) 'amenable', and (d) 'docile' are all words for being obedient and easy to persuade, which is the opposite of the child's behavior.

Rule: Vocabulary of Negotiation. The phrase 'acceptable to both' indicates an agreement was made where each side gave something up. 'Compromise' is an agreement or a settlement of a dispute that is reached by each side making concessions. This is the correct term for the outcome of a successful negotiation. Options (a) 'stalemate' and (b) 'deadlock' refer to situations where no progress can be made. Option (d) 'dispute' is the problem, not the solution.

Rule: Verbs of Support/Opposition. New fossil discoveries that fit into the existing framework would support the theory of evolution. 'Bolster' means to support or strengthen. This is the correct word for evidence that reinforces a theory. Options (a) 'refute', (b) 'disprove', and (c) 'negate' are all synonyms meaning to prove something to be wrong, which is what evidence that *contradicts* a theory would do.