Definition: 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: Invertebrates are animals that lack a vertebral column, or backbone., Fact2: Snails and slugs are invertebrates., Question: what do snails and slugs lack? (A) eyes (B) a nervous system (C) kinetic energy (D) Chlorophyll (E) Energy. (F) life (G) a backbone (H) Energy
Output:
G