Definition: 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 gravitational pull of the Moon on Earth 's oceans causes the tides, Fact2: Tides A tide is vertical movement of water., Question: The moon's gravitational pull on Earth 's oceans causes the vertical movement of what? (A) oceans (B) rivers (C) matter (D) waves (E) deserts (F) asteroids (G) the sun (H) water
Output:
H