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").
Problem:Fact1: infection can cause bodily tissues to swell, Fact2: Doctors call such tissue swelling edema., Question: What causes edema? (A) An infection (B) amoebae (C) heating liquids (D) An antibiotic (E) smoking (F) Vitamins (G) prolactin release (H) Food poisoning
Solution:
A