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: 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: Mutations that lead to cancer usually occur in genes that control the cell cycle., Fact2: Cancer is an example of a mutation in cells., Question: What usually occur in genes that control the cell cycle? (A) Leptospirosis (B) competition (C) A Greek letter (D) a mutation in cells (E) Plant reproduction (F) biological diversity (G) resistance (H) resistance activities
[EX A]: D

[EX Q]: Fact1: natural magnetism is used for pointing north by a compass, Fact2: To find direction, students magnetize needles and locate North., Question: Finding directions can be done by using a compass that what? (A) 295 degrees Kelvin (B) safe operation (C) points out (D) shares ideas (E) points north (F) as a base (G) specialized (H) points oddly
[EX A]:
E