Which statement is an example of a theme?
A.Sacrifices and hard work pay off in the end, despite the challenges along the way.
B.A working college student misses out on fun activities, but his hard work helps him appreciate his degree.
C.Gene has to work nights to pay for college and is unable to attend all the cool parties.
D.Gene's hard work pays off in the end, and he graduates from the university at the top of his class.