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").

Q: Fact1: cross-pollination increases genetic diversity, Fact2: Evolution requires genetic diversity., Question: What does evolution require? (A) Time and energy (B) Plant reproduction (C) cross-pollination (D) Reproduction (E) gene flow (F) coded genes (G) circulatory systems (H) animals with backbones

A: C
****
Q: Fact1: smoking tobacco decreases stamina, Fact2: Decreased stamina or stunted growth are two important signs that a murmur is significant., Question: Smoking tobacco can cause what? (A) heart health (B) lymphoma (C) murmur (D) good lungs (E) heart strength (F) cancer (G) disease (H) symptoms

A: C
****
Q: Fact1: Playing is just one of many ways that mammals and other animals learn how to behave., Fact2: Mammals include dogs, cats, and horses., Question: what uses play as a way to learn how to behave? (A) koalas (B) bears (C) dogs (D) clouds (E) humans (F) otters (G) plants (H) theater

A:
C
****