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: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: After sediments are deposited, they are gradually buried by more sediments., Question: What can lead to the gradual burial of more sediments? (A) erosion (B) loose soil (C) an ocean (D) a wave (E) a delta (F) wind (G) a lake (H) flooding
A:
E