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: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Black sand is volcanic ash., Question: Black sand can do what to the sun? (A) protection (B) heating (C) destruction (D) saves lives (E) Injure them (F) damaging (G) block out (H) danger
A:
G