The secretions of the adrenal medulla act to supplement the effects of
a) parasympathetic innervation
b) sympathetic stimulation
c) vagus nerve activity
d) neurosecretory substances

Correct option is B.

Explanation:

Sympathetic nervous system is known as primary process to regulate the body fight or fight response, which is also called as sympatho adrenal response. This response end in the adrenal medulla which produce acetylcholine, and active the large secretion of adrenaline also known as epinephrine, and to a less extent noradrenaline or norepinephrine from it.

Sympathetic stimulation is constantly active, and maintain a basic homeostasis level in living organisms.

explanation:

yes you are doing it right great gob

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.