Correct Answer:
C. Boils
The correct answer is Boils. This question tests knowledge of common English proverbs. The proverb "A watched pot never boils" means that time seems to pass more slowly when one is waiting impatiently for something to happen. The verb "boils" refers to the specific action of water reaching its boiling point, which is the core concept of the proverb.
- A: Cooked is in the past tense and does not fit the present tense, continuous nature implied by the proverb's meaning.
- B: Steams is an action related to boiling water but is not the specific verb used in this well-known idiom. The proverb focuses on the act of reaching the boiling point.
- D: None of these is incorrect because "Boils" is the correct and universally accepted word in this proverb.