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").
Input: Fact1: the moon revolving around the Earth causes the phases of the moon, Fact2: Tides are cyclical and closely follow the phases of the moon., Question: What occurs in water as the moon revolves around Earth? (A) tides (B) gravity (C) liquid (D) energy (E) pollution (F) heat (G) earthquakes (H) erosion
Output:
A