Given the task definition and input, reply with output. 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: Some parasites kill their host, but most do not., Fact2: All parasites are harmful to their host, but some are beneficial to humans., Question: Some what are beneficial to humans? (A) fungi (B) parasites (C) roots (D) humans suffering (E) natural disasters (F) honeybees (G) poisons (H) orchids
B