Detailed 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").
Problem:Fact1: a laser is used for producing light, Fact2: Furthermore, such laser light is polarized., Question: What are lasers? (A) energy (B) inactive (C) Firecrackers (D) polarized (E) heated (F) electricity (G) magnetized (H) irregular
Solution:
D