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: when a river floods , that river deposits soil in flood plains, Fact2: Plants grow in soil., Question: What do flooding rivers help plants do? (A) growth (B) store (C) roots (D) health (E) grow (F) adapt (G) widen (H) expand
Output:
E