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: decomposition increases amount of organic matter in soil, Fact2: Fungi are involved in decomposition, as well., Question: What can help increase the amount of organic matter in soil?  (A) Fungi (B) mussels (C) pine (D) worms (E) animals (F) Enzymes (G) solutes (H) trees
[EX A]: A

[EX Q]: Fact1: a battery converts chemical energy into electrical energy, Fact2: Check the fire alarm's batteries the first of each month., Question: What converts chemical energy into electrical energy? (A) Something in a fire alarm (B) sperm and egg fuse (C) Males and females (D) igniting fuel and oxidiser (E) The bending of a ray of light (F) basic building blocks of life (G) sensory neurons (H) mechanical waves
[EX A]: A

[EX Q]: Fact1: Some pelycosaurs gave rise to a group of animals called therapsids., Fact2: Pelycosaurs and therapsids are theropsids., Question: what are therapsids? (A) bacteria (B) animals (C) lamphreys (D) tigers (E) prokaryote (F) marine (G) arachnids (H) aquatic
[EX A]:
B