Given the task definition and input, reply with output. 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").

Fact1: the movement of tectonic plates causes volcanic eruptions, Fact2: Volcanic eruptions can also cause tsunamis., Question: What can cause tsunamis? (A) cloud movement (B) The area was once underwater (C) sonic booms (D) energy of moving objects (E) the movement of tectonic plates (F) deadly and devastating (G) mountain formations (H) wind and erosion
E