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: sediment is formed by weathering, Fact2: Rocks breakdown by weathering., Question: When rocks break down, what do they make? (A) fossil fuels (B) sediment (C) disintegrate (D) soft soil (E) calcite (F) body water (G) hills and valleys (H) rupture
B