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: Invertebrates are animals without backbones, and vertebrates are animals with backbones., Question: what do vertebrates have? (A) tails (B) strength (C) eardrum (D) heart (E) brain (F) Chlorophyll (G) back bone (H) stamina
G