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: unequal heating of Earth 's surface by the Sun causes global wind patterns, Fact2: Finally, the pattern of tropical wind and ocean circulation is a key element of global circulation., Question: Unequal heating of the Earth's surface by the Sun causes ocean circulation and what? (A) Energy. (B) climate (C) raincoats (D) The atmosphere (E) tropical wind (F) freezing rain (G) pouring down (H) to move people
A:
E