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: Vertebrates are all chordates that have a backbone., Fact2: Mammals are like other chordates in that they have backbones., Question: What are like other vertebrates that have a backbone? (A) animals (B) sharks (C) vibrations (D) sound (E) mammals (F) alpacas (G) bees (H) cows
E