Bob Was Completely Bald on the Top of His Head

Multiple Choice

Bob was completely bald on the top of his head by the time he was 35 years of age. Bob noticed he produced abundant sweat on his head when he exercised. He also noticed that his scalp was no longer oily. Which of the following changes account for the observations?
(1) He has fewer functional hair follicles now.
(2) He has fewer functional sebaceous glands now.
(3) He has fewer merocrine sweat glands now.
(4) He has fewer apocrine sweat glands now.

A) 1, 2, 3, 4
B) 1, 2, 3
C) 1, 2, 4
D) 1, 3, 4
E) 1, 2