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: 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
[EX A]: C

[EX Q]: Fact1: Echinoderms lack a centralized nervous system., Fact2: Sand dollars and sea biscuits are also echinoderms., Question: What lacks a centralized nervous system? (A) Damaged hearing (B) Humans (C) Horses (D) Sand dollars (E) insects (F) Chickens (G) Pesticides (H) barnacles
[EX A]: D

[EX Q]: Fact1: Amphibians have permeable skin that easily absorbs substances from the environment., Fact2: Amphibian skin lacks hair or scales., Question: What do amphibians lack? (A) brain (B) fat (C) hair (D) power (E) oxygen (F) lungs (G) nectar (H) skin
[EX A]:
C