What is the function of trophic hormones?

What is the function of trophic hormones? They:-

a). stimulate the pineal gland to secrete hormones.
b). stimulate the thymus gland to secrete hormones.
c). stimulate other endocrine glands to secrete hormones.
d). stimulate the nervous tissue to secrete hormones.

PLACE THIS ORDER OR A SIMILAR ORDER WITH NURSING TERM PAPERS TODAY AND GET AN AMAZING DISCOUNT