Question 3 saved which of the following is not a controllable risk factor? question 3 options: a) exercising b) age c) smoking d) all of the above i'll mark brainiest for correct !

Hey there! :D

You cannot control this risk factor. Of the choices, the thing you can't control is your age. You cannot choose what age you are, how your body is developing, your mental stability at a certain age, etc. This is out of your control. You can, however, control how much you exercise or smoke. 

I hope this helps!
~kaikers

Your age is not a controllable risk factor.