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: plant reproduction requires pollination, Fact2: Perennial types are planted outside in spring., Question: what reproduction requires pollination? (A) humans (B) They lay eggs (C) Tropical (D) bees (E) insects (F) subtropical (G) perennials (H) heterotrophs
[EX A]: G

[EX Q]: Fact1: Evolution occurs in response to a change in the environment., Fact2: Extinction is a natural part or the process of evolution., Question: What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery
[EX A]: B

[EX Q]: Fact1: using renewable resources to generate power reduces greenhouse gases, Fact2: Carbon dioxide is a greenhouse gas., Question: What does using renewable resources to generate power reduce? (A) Heat energy (B) carbon dioxide (C) kinetic energy (D) lowered energy cost (E) sunlight (F) oxygen (G) climate (H) water
[EX A]:
B