Certain religions practice fasting (missing meals) and may only eat at night. Which of the following would you expect after a fast?

I. an increase of insulin concentration in the blood
II. an increase of glucagon concentration in the blood
III. an increase in the storage of glycogen in the liver
IV. a decrease in glycogen stores in the liver

A) II only
B) II and III
C) II and IV
D) I only