Suppose a friend tells you that she wants to get a tan because of people with tans look healthier. What would you tell her?

No. There is no safe amount of tanning. Tanning isn't bad for you just because it comes with the risk of burning, which can cause skin cancer.

 I would tell her that they may LOOK healthier, but they are at risks for many things.

Explanation:

If I were her, I would just stick to the sun tanning, when your laying out in the sun and get a little tan. Not to go someplace and get a tan, its dangerous.

what effect does exercise have on the nervous system?

the answer is c.

b and d are your answers i just answered this question