Answer:
The answer is: A. hormonal control.
Step-by-step explanation:
Hormones are the body's chemical messengers that control numerous functions and circulate through the blood to organs and tissues.
The endocrine system consists of a group of glands and organs that regulate and control various functions of the body through the production and secretion of hormones.
Blood or urine tests can determine the levels of various hormones in the body, including: reproductive, thyroid, adrenal, pituitary and many other hormones.
The answer is: A. hormonal control.