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: Hermit crabs use the shells of dead snails for homes., Fact2: Gastropods are snails and slugs., Question: Whose shells do hermit crabs take? (A) chelonians (B) Porifera (C) jellyfish (D) coral (E) paramecium (F) arachnids (G) gastropods (H) sponges
G