instruction:
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").
question:
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
answer:
D

question:
Fact1: All chemical reactions require activation energy to get started., Fact2: Fire is a chemical reaction., Question: What does fire require to get started? (A) an engine (B) activation energy (C) water (D) energy usage (E) direct energy (F) dogs (G) activated almonds (H) adding heat
answer:
B

question:
Fact1: burning wood is used to produce heat, Fact2: Interior woods are birch, spruce and pine., Question: What is burned to produce heat? (A) Oak (B) Gold (C) Spruce (D) cellulose (E) Conifers (F) bamboo (G) Plastic (H) Aluminum
answer:
C