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: transportation technology is used for moving people, Fact2: Supersonic transport is a viable means of transportation., Question: Which of the following is the fastest that people can be moved with current technology? (A) Riding a bike (B) bicycle (C) speed of light (D) supersonic (E) Summer (F) superluminal (G) electricity (H) highway speed
Output:
D