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: Arteries generally carry oxygen-rich blood., Fact2: Oxygen-rich blood is bright red., Question: what do arteries carry? (A) brain waves (B) bright red blood (C) wavelengths and photons (D) nerve cells (E) energy of moving objects (F) Veins and arteries. (G) veins (H) heat energy
Output:
B