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: using cell phones can cause people to become distracted, Fact2: Video phone is also possible using iphone., Question: What can cause people to become distracted? (A) paying attention (B) watching the road (C) being alert (D) using iPhones (E) smoking cigarettes (F) cigarettes (G) hypothyroidism (H) Electrical energy
Output:
D