Final answer:
The apocrine sweat glands become active during puberty and are responsible for the characteristic body odor in the axillary region due to bacterial breakdown of their secretions.the right answer is C
Step-by-step explanation:
The apocrine sweat glands in the axilla become active at the time of puberty. This type of sweat gland is different from eccrine sweat glands, which primarily release sweat consisting of water to regulate body temperature. Apocrine sweat glands are larger, are located deeper in the skin, and their ducts empty into hair follicles. These glands start producing a thicker, fatty secretion during puberty that when broken down by bacteria on the skin, leads to body odor.