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: friction causes an object to lose energy, Fact2: Objects An object can be one of several things., Question: What does friction cause things to lose? (A) heat (B) moisture (C) toughness (D) Energy. (E) traits (F) light (G) energy (H) cartilage
[EX A]: G

[EX Q]: Fact1: matter vibrating can cause sound, Fact2: Thus, sound is a wave in air ., Question: what can matter vibrating cause? (A) Pollution (B) energy (C) Relieve pain (D) kinetic energy (E) wave in air (F) Energy. (G) murmur (H) Greenhouse gases
[EX A]: E

[EX Q]: Fact1: Competition may lead to aggressive behaviors or displays of aggression., Fact2: Another form of aggressive behavior is the verbal outburst., Question: what may competition lead to? (A) Plant growth is reduced (B) if humans disturb bears (C) enormous damage to homes (D) negative (E) major threat to health (F) harm them (G) verbal outbursts (H) resistance activities
[EX A]:
G