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: Passive immunity lasts only as long as the antibodies survive in body fluids., Fact2: An antibody is a protein that attaches to an antigen., Question: What lasts only as long as the proteins that attach to an antigen survive in body fluids? (A) hospitalization (B) recovery (C) parasites (D) solid, liquid, gas (E) Leptospirosis (F) Allergies (G) resistance (H) passive immunity
A:
H