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").

[EX Q]: Fact1: Migrants typically travel long distances., Fact2: Migrant birds arrive., Question: What travels long distances? (A) humans (B) jets (C) rocks (D) birds (E) camels (F) cocoons (G) Light (H) eggs
[EX A]: D

[EX Q]: Fact1: a greenhouse is used to protect plants from the cold, Fact2: Plants are very easily raised from seed, sown in a cold greenhouse from February to April., Question: What does a greenhouse protect plants from to help them grow easily? (A) death (B) hotness (C) Winter (D) fronts (E) heat (F) drought (G) rain (H) chill
[EX A]: H

[EX Q]: Fact1: a plant requires food for survival, Fact2: Food is the ideal source of nutrients., Question: What do plants require nutrients for? (A) growth (B) water vapor (C) ice (D) Energy. (E) bloom time (F) survival (G) Energy (H) hurricanes
[EX A]:
F