Which of the following is NOT a normal age-related change in the integument?
a. Melanocyte activity decreases, causing older people to become more prone to sunburn.
b. Sebaceous glands become less numerous and as sebum declines, the skin becomes dry and sometimes scaly.
c. The dermis becomes thickened and elastic fibers build up, causing wrinkles and sagging.
d. Elderly people are less able to regulate body temperature due to reduced blood supply to the skin and decreased production of perspiration.