You will be given a definition of a task first, then some input of the task.
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").

Fact1: ultraviolet light causes sunburn, Fact2: Sunburns are a risk factor for skin cancer., Question: Ultraviolet light can cause what? (A) heat energy (B) skin cancer (C) killing insects (D) chemical changes (E) brain cancer (F) occular cancer (G) lung cancer (H) hypothyroidism
Output:
B