What happens next in this paragraph?

How to know if you're too old for something
Know your limits.
What you can and can't do will change with time and age. Perhaps what you could do at age 6 you can't do at age 16.
Choose your answer from:
(a). If you know you are not in the right physical or mental condition to do something, you probably shouldn't do it. You should also avoid doing anything that gets unsafe with a certain size or weight..
(b). Maybe think about things you'd rather try before age 16. Consider doing activities that make you happy..
(c). But it's important to know your limits so you can decide how you can decrease them. Take an adult for a blood test (systolic blood tests) every six months..
(d). Whatever it is that you do now that you are older, take a second to identify your limits. The more you know, the more likely you are to be able to change what you might do by age 7..
(a).