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

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.