In order to improve the condition of your muscular system, you could participate in aerobic activity at least
a.
3 minutes 5 times a week
b.
10 minutes 4 times a week
c.
30 minutes 3 times a week
d.
50 minutes 3 times a week

Andrew feels good about himself. he doesn't know exactly why he is so happy, but every day he looks forward to his schoolwork and chores. "i play a game," he says. "i make a list of everything i have to get done, and then i try to finish it all before a certain time. for some reason, i feel great when i beat my time." based on this information, why is andrew happy? he gets a proper amount of sleep he eats healthy meals he has a strong family support group he regularly meets his own goals