Which of the Following Is an Example of the Exhaustion

Which of the following is an example of the exhaustion stage of the general adaptation syndrome?

A) Betty steps down as class treasurer her senior year because she needs to focus on her grades.
B) Burt is determined to learn how to play chess, so he spends all his time reading chess books.
C) After wondering for months if he was going to lose his job, Nicolao begins to develop stomach ulcers.
D) Nanette stays up all night to study for her math test.