A person's blood sugar level at a particular time of the day is partially determined by the time of the most recent meal. After a meal, blood sugar level increases rapidly, then slowly comes back down to a normal level. Sketch a person's blood sugar level as a function of time over the course of a day. Label the axes to indicate normal blood sugar level and the time of each meal.

Which of the graphs A-E below best represents a person's blood sugar level as a function of the time of day? Note the three black points included in each graph denote the blood sugar level just prior to a meal.
Enter the letter of the graph:

ABCDE

(click on each graph to enlarge)