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: infection can cause bodily tissues to swell, Fact2: Connective tissue is the common network for bodily systems and energy pathways., Question: What can cause connective issues to swell? (A) infection (B) flooding (C) smoking (D) worms (E) water (F) bacteria (G) zygotes (H) air
A:
A