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").

Example input: Fact1: a plant requires sunlight to grow, Fact2: Plants to avoid are fast-growing vines that can take over an area in no time., Question: What requires sunlight in order to take over an area? (A) spores (B) fish (C) plants (D) humans (E) pods (F) Oak (G) opossums (H) coral
Example output: C
Example explanation: This is a good example. Based on the facts plants require sunlight in order to take over an area.
Q: Fact1: Energy enters ecosystems in the form of sunlight or chemical compounds., Fact2: Biomes are global ecosystems., Question: Where does energy enter into in the form of sunlight and chemical compounds? (A) sun (B) science lab (C) biomes (D) orchids (E) photons (F) deserts (G) black hole (H) trees
A:
C