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: Soil can be depleted of nutrients., Fact2: Soil or dirt is a very heavy material., Question: What can be depleted of nutrients? (A) bamboo (B) fungi (C) dirt (D) moss (E) oxygen (F) free space (G) the Moon (H) cacti
C