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: Most people can survive only a few days without water., Fact2: Water is the best fluid for hydration., Question: What can people only survive a few days without? (A) dehydration (B) hydration (C) bacteria (D) sodium (E) food (F) yogurt (G) Chlorophyll (H) oxygen
[A]: B


[Q]: Fact1: Viruses cause many human diseases., Fact2: Some smallpox viruses are maintained in laboratories., Question: What can smallpox cause? (A) contamination (B) harmful substances (C) vaccines (D) photosynthesis (E) extinction (F) cellular respiration (G) Destroy crops (H) human disease
[A]: H


[Q]: Fact1: Insects may live in large colonies and have complex social behaviors., Fact2: Ants are social insects., Question: What may live in large colonies and have complex social behaviors? (A) spiders (B) bees (C) planets (D) star (E) bats (F) ants (G) Wasps (H) toads
[A]:
F