Kelsey Works as an Emergency Dispatcher

Kelsey works as an emergency dispatcher.She thought the job would be exciting,but it has turned out to be more stressful than exciting.She works long hours and seldom receives any recognition.The only time people seem to notice what she does is when the emergency units are slow in responding.She has become disillusioned with her job,and she often calls in sick.What is Kelsey experiencing in this case

A)  post-traumatic stress disorder 
B)  amotivational syndrome 
C)  general adaptation syndrome 
D)  burnout