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: Immunodeficiency occurs when the immune system is not working properly., Fact2: Many cancers can cause immunodeficiency., Question: What can happen with the immune system when the body has cancer? (A) a lot of human deaths (B) It won't work properly (C) major threat to health (D) It will work efficiently (E) hospitalization (F) It will grow (G) direct damage to the lungs (H) It won't do anything
Output:
B