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: measuring the hardness of minerals requires scratching those materials, Fact2: To figure out the hardness of a mineral, the Moh's scale of hardness is used., Question: the Moh's scale of hardness is used by doing what to the materials (A) heating (B) tool extensions (C) protection (D) classified (E) scratching (F) as a base (G) how they move (H) Cladistics
[A]: E

[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
[A]: D

[Q]: Fact1: heating an egg causes a chemical reaction in the egg, Fact2: Insects hatch from eggs., Question: heat causes (A) heating liquids (B) energy of moving objects (C) global warming (D) insects to hatch (E) sweating (F) electricity (G) Greenhouse gases (H) kinetic energy
[A]:
D