In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: Infancy is the period of most rapid growth after birth., Fact2: During infancy, babies learn whether to trust the world., Question: Babies do what most during their rapid growth period? (A) birth (B) move (C) run (D) fight (E) puberty (F) play (G) learn (H) shaking
G

Fact1: Evolution occurs in response to a change in the environment., Fact2: Animals react instinctively to changes in their environment., Question: What occurs in animals as they respond to changes in their habitat? (A) starvation (B) evolution (C) arousal (D) relocation (E) resistance (F) dependency (G) Leptospirosis (H) Movement
B

Fact1: Caffeine is a central nervous system stimulant., Fact2: Coffee is an excellent source of caffeine., Question: what is a central nervous system stimulant? (A) blood (B) NaCl (C) SO2 (D) coffee (E) h2o (F) salt (G) vinegar (H) A drug.

D