An 85-Year-Old Patient Comments During His Annual Physical That He

An 85-year-old patient comments during his annual physical that he seems to be getting shorter as he ages.The nurse should explain that decreased height occurs with aging because:

A) long bones tend to shorten with age.
B) of the shortening of the vertebral column.
C) there is a significant loss of subcutaneous fat.
D) there is a thickening of the intervertebral discs.