**Rule: Understanding Idiomatic Expressions.** The idiom 'let bygones be bygones' means to agree to forget about past disagreements or offenses. The act of repairing a friendship is a direct result of this decision to forgive. Option (b) is the correct definition. Option (a) and (d) are the opposite. Option (c) is an incorrect interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a close shave' (or 'a close call') refers to a situation in which one narrowly avoids a dangerous or undesirable outcome. Almost being hit by a car is a perfect example of a narrow escape. Option (c) is the correct definition. Option (d) is the literal meaning of the phrase, but not the idiomatic one. Option (a) is an incorrect interpretation. Option (b) is related but 'narrow escape' is more precise.

**Rule: Understanding Idiomatic Expressions.** The idiom 'the apple of one's eye' refers to a person who is dearly loved and treasured above all others. It signifies great affection and pride. Option (c) is the correct definition. Option (a) and (b) are incorrect interpretations. Option (d) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'face the music' means to confront and accept the negative results of something one has done. Resigning from a position after a scandal is a clear example of facing the consequences. Option (b) is the correct definition. Options (a) and (d) are literal misinterpretations. Option (c) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'by hook or by crook' means to achieve something by any possible means, not caring if the methods are honest or dishonest. It implies a strong determination to succeed, regardless of the morality of the methods used. Option (c) is the correct definition. Option (b) represents only one half of the possibilities. Option (a) is a literal misinterpretation. Option (d) is the opposite of determination.

**Rule: Understanding Idiomatic Expressions.** A 'wild goose chase' is a pointless and fruitless search or pursuit. Searching for 'data that didn't exist' is a perfect example of a hopeless task. Option (c) is the correct definition. Option (a) and (d) are the opposite. Option (b) is a literal interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'can't make head or tail of something' means to be completely unable to understand it. It is used to express confusion. Option (b) is the correct definition. Options (a) and (d) are the opposite. Option (c) is a literal misinterpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'heart and soul' means to do something with a great deal of passion, commitment, and energy. It implies total dedication. Option (a) is the correct definition. Options (b) and (c) suggest a lack of dedication. Option (d) is an incorrect interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'have a soft spot for someone' means to be particularly fond of them and to treat them with more leniency than others. Always forgiving someone's mistakes is a clear sign of such fondness. Option (c) is the correct definition. Option (a) is a literal misinterpretation. Options (b) and (d) are the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'in the doghouse' means to be in trouble with someone, typically a spouse or partner, because of something you have done wrong. Forgetting an anniversary is a classic reason to be in the doghouse. Option (a) is the correct definition. Option (b) is a literal interpretation. Options (c) and (d) are the opposite of being in trouble.