Answer the following question given this paragraph: 

Noninfectious diseases are not contagious because they are not caused by pathogens. Instead, they are caused by such factors as lifestyle choices, environmental toxins, or mutations.


Q: Why are noninfectious diseases not contagious?

 Choices:

- they are contagious

- they are viral

- they are inherited

- non-pathogen caused

A:
non-pathogen caused
