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: fossils are formed when layers of sediment cover the remains of organisms over time, Fact2: Fish Fish are the ultimate aquatic organism., Question: What can be formed when layers of sediment cover the remains of fish? (A) oysters (B) detritus (C) bones (D) deposits (E) fossils (F) metamorphic rocks (G) volcanic rock (H) shells
E