An individual, driving through his neighborhood, suddenly jams on his car brakes to avoid hitting a child who runs into the road after a ball. A few seconds later, the driver finds that he is shaking and his heart is pounding. This is primarily due to the secretion of which one of the following?
A) epinephrine from the adrenal medulla B) cortisol from the adrenal cortex C) insulin from the pancreas D) thyroxine from the thyroid E) norepinephrine from the adrenal cortex