Each Adrenal Consists of an Outer Covering, the ____, and an Inner

Each adrenal consists of an outer covering, the ____, and an inner core called the ____.

A) pre-ganglionic fibers, paraventricular nucleus
B) sympathetic-adrenal medulla axis (SAM) , sympathetic-adrenal cortex axis (SAM)
C) adrenal cortex, adrenal medulla
D) adrenal medulla, adrenal cortex