Some of the changes that are attributed to aging are actually brought about by poor health habits. One of these is osteoporosis, which could be prevented by

A) adequate calcium intake and eating a high-protein diet.
B) avoiding cigarettes, an adequate calcium intake, and exercise.
C) exercise and a high-protein diet.
D) drinking adequate amounts of water, and exercising.
E) a low-fat and protein diet.

Osteoporosis can be prevented by avoiding cigarettes, as smoking increases the risk of bone loss. Adequate calcium intake is also important for bone health, and exercise helps to build bone density. A high-protein diet may be beneficial, but it should not be the only focus for preventing osteoporosis. Drinking adequate amounts of water is important for overall health, but it is not specifically linked to preventing osteoporosis. A low-fat and protein diet is not recommended for preventing osteoporosis.