All factors that influence our physical fitness can be controlled.
a. true
b. false

It is false that all factors that influence our physical fitness can be controlled. Although many of these factors can indeed be controlled, not all of them can. There are simply some things that happen, regardless of the fact whether you want that or not, so you just have to get used to them and turn them to your advantage.

The answer is d because , safety almost always works, to prevent stds and pregnancy