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: Pneumonia may be caused by an infection or injury of the lungs., Fact2: Legionnaires' disease is a type of pneumonia., Question: What may be caused by an infection or injury of the lungs? (A) death and devastation (B) deadly and devastating (C) Legionnaires' disease (D) blood (E) smoking (F) a lot of human deaths (G) a tree falling (H) cigarettes
C