Which response best illustrates negative feedback control within the male reproductive endocrine system?

• A. Rising testosterone levels suppress release of hypothalamic and pituitary reproductive hormones
• B. Increasing testosterone concentrations stimulate additional GnRH secretion
• C. Elevated LH levels directly increase ADH secretion to conserve water
• D. Higher estrogen levels trigger continuous oxytocin release from the posterior pituitary

Answer: (A)