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: Migration is a type of movement that changes population size., Fact2: Predatory animals migrate with the game animals., Question: When game animals move elsewhere, what else does? (A) relocation (B) prey animals (C) predatory animals (D) migratory birds (E) An object is seen (F) migrants (G) refract or absorb. (H) barks and snarls
[EX A]: C

[EX Q]: Fact1: Ants communicate with chemicals called pheromones., Fact2: Ants use receptors on their antennae to follow recruitment pheromone trails., Question: What do ants use to communicate? (A) nerves (B) heat energy (C) sound (D) binary code (E) light energy (F) Antennae. (G) megaphones (H) hand signals
[EX A]: F

[EX Q]: Fact1: bacteria in soil convert atmospheric nitrogen into a form usable by plants, Fact2: More bacteria mean healthier soil., Question: What allows soil to convert atmospheric nitrogen into a usable form by plants? (A) hydrogen and oxygen (B) diseased soil (C) peachleaf willow (D) bacteria-free soil (E) healthier soil (F) nutrients (G) virus filled soil (H) Cooking
[EX A]:
E