It would be A because when you are younger you want to have a higher heart rate while working out.
The correct answer is A. stretch, warm-up, workout, stretch.
When you decide to start working out, the first thing you need to do is stretch your body - without it, your work out won't be successful. After that, you need to warm up your body so as to avoid any injury. After you finish working out, it is important to stretch again, to complete your session.
In here, for this one, i would go with the answer choice Weight training, because if you are over weight, that is a big problem, because you can not regulate well enough, and your body as well..
hope that this helps you. =)
