Use the Following to Answer Questions

Use the following to answer questions :
Refer to the graphs below.

-What can be concluded from the graph depicting epinephrine increases during normal and crowded train trips?

A) Traveling by train is generally stressful, whether the train is crowded or not.
B) Travel in a crowded train creates more stress than an uncrowded train trip.
C) Lower epinephrine levels indicate that a trip on an uncrowded train is more stressful.
D) Epinephrine levels during normal and crowded train trips are not related to feelings of stress.