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: an earthquake causes the ground to shake, Fact2: Seismic waves are produced by earthquakes., Question: Seismic waves cause what to shake? (A) earth (B) body water (C) wind (D) tremors (E) sunlight (F) the ground (G) Sediment (H) rocks
A:
F