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: Most invertebrates have a nervous system., Fact2: Afferent information is information that is inbound to the nervous system., Question: What have afferent information inbound? (A) fur seals (B) energy of moving objects (C) electromagnetic energy (D) sensory neurons (E) Electric devices (F) Most invertebrates (G) matter vibrating (H) Veins and arteries.
Output:
F