Detailed Instructions: 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").
Q: Fact1: Corals form large colonies in shallow tropical water., Fact2: Coral reefs are found in the warm, clear, shallow waters of tropical oceans worldwide., Question: Where do coral colonies form? (A) ocean loor (B) south atlantic (C) warm, clear, shallow waters (D) exposure to the sun (E) arctic ocean (F) To conserve energy (G) sub-units of species (H) To another location like underground
A:
C