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: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insect wings are attached to the dorsal side of their thorax., Question: What side of an insect are wings attached to? (A) white (B) dorsal (C) protected (D) abdomen (E) elytra (F) three (G) strong (H) tail
[EX A]: B

[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: Mammals can also generate little bursts of heat by shivering., Fact2: All humans are mammals., Question: what can generate little bursts of heat by shivering? (A) rabbit (B) goats (C) bears (D) humans (E) clouds (F) trees (G) animals (H) the sun
[EX A]:
D