Detailed Instructions: 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: moss causes chemical weathering, Fact2: Bryophytes are mosses, liverworts, and hornworts., Question: What can cause chemical weathering? (A) bryophytes (B) moonlight (C) cacti (D) global warming (E) calcite (F) viruses (G) ferns (H) friction
A:
A