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: Molecules of DNA are encoded with instructions that tell cells what to do., Fact2: Genes, made of DNA, carry the instructions for building proteins., Question: what do genes carry? (A) pollen (B) Energy (C) calories (D) instructions (E) Chemical energy (F) fat (G) acid (H) colors
[EX A]: D

[EX Q]: Fact1: disease has a negative impact on an organism, Fact2: Peace is freedom from sickness and disease., Question: What has a negative impact on an organism? (A) influenza (B) sickness (C) smallpox (D) leukemia (E) liver cancer (F) food (G) air (H) water
[EX A]: B

[EX Q]: Fact1: Echinoderms have a unique water vascular system with tube feet., Fact2: Sea stars use hundreds of tube feet., Question: Sea stars use a unique water vascular system with what? (A) growth (B) a ray (C) feet (D) oxygen (E) porous (F) energy (G) Light (H) volume
[EX A]:
C