Around age 40, adults __________

A) see a decline in sexual functioning.
B) may need to wear bifocal lenses.
C) experience a sharpening of the senses.
D) do not experience any physical changes.

Around age 40, many adults experience presbyopia, a condition that causes the lens of the eye to lose flexibility, resulting in difficulty focusing on close objects. This is corrected with bifocal or reading glasses. While some adults may experience changes in sexual functioning as they age, it is not a universal experience. There is no evidence that adults experience a sharpening of the senses at age 40, and it is unlikely that they do not experience any physical changes.