Instructions: 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").
Input: Fact1: Vertebrates are all chordates that have a backbone., Fact2: Invertebrates are animals who lack a backbone or spinal column., Question: What do all vertebrates have that invertebrates don't? (A) sensory neurons (B) fur and fat (C) bones and joints (D) a jaw bone (E) kinetic energy (F) Chemical energy (G) a spinal column (H) a set of gills
Output:
G