Q: 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: Invertebrates are animals that lack a vertebral column, or backbone., Fact2: Many invertebrates have an exoskeleton., Question: Many animals that lack a vertebral column, or backbone have a what (A) spine (B) exoskeleton (C) parasites (D) Leptospirosis (E) epidermal (F) Damaged hearing (G) skeleton (H) hip bone
A:
B