Hormones - a chemical realesed by the endocrine system in the bloodstream
I don’t think you want your health being evaluated by a bunch of high schoolers.
If you’re concerned ask your doctor.
I would say the best answer would be B) is the information up to date?
The other three aren’t necessary (illustrations, online, and being in US).
It needs to be current and accurate.
The answer is Circuit training. So you got that answer right.:)
