Q: Fact 1: Pathogens can cause disease. Fact 2: Legionnaires' disease is a serious disease. Given the two facts above, pathogens can cause what?

Pick from: (a). smallpox. (b). symptoms. (c). killing insects. (d). type 1 diabetes. (e). a broken arm. (f). Legionnaires'. (g). plantar fasciitis. (h). influenza.
The answer is:
(f).