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").
Q: Fact1: Some touch receptors sense differences in temperature or pain., Fact2: Merkel's discs are touch receptors., Question: What sense differences in temperature or pain? (A) Veins and arteries. (B) the skin (C) Merkel's discs (D) movie discs (E) frontal zones (F) cd discs (G) sensory neurons (H) sound discs
A:
C