Teacher: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").
Teacher: Now, understand the problem? Solve this instance: Fact1: Constriction occurs when the muscular walls of blood vessels contract., Fact2: Cocaine constricts the blood vessels., Question: Cocaine causes what to contract? (A) layers of fat (B) a lot of human deaths (C) Walls of blood vessels. (D) harmful substances (E) the rest of the body (F) metabolic reaction (G) direct damage to the lungs (H) decreases its bodily water
Student:
C