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: infection can cause bodily tissues to swell, Fact2: Bacteria can cause infection., Question: What can bacteria cause? (A) dead organisms (B) Something that causes allergies (C) contamination (D) fissures of hot, acidic water (E) cookies (F) dogs (G) bodily tissues to swell (H) vapor
G