Regular participation in high levels of physical activity can lead to less excess weight in adults and includes the highest benefit for those who begin their exercise regimens
a. in the evenings.
b. in the morning.
c. before middle age.
d. before their early twenties.
i've been looking through my textbook for about 5 minutes and i cannot find anything. i'm guessing c, but would like a second opinion.

Why is it that people at first would be nice then they shut you down? (school matter)

Foods that fill your body with sugar and fat but little else, are said to contain

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.