How can you to prevent muscle mass loss as you age?
a. you can't prevent muscle mass loss; it's inevitable as you get older.
b. lift weights twice a week.
c. maintain a regular exercise program.
d. cut back on the amount of calories you eat during the day.

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.