Choose the sentence that is written correctly.
A.
A good student, a hard worker, and the desire to do well on the test.
B.
Studying for the difficult test tomorrow to get a good grade in the class.
C.
He wanted to do well on the test, so Rusty studied; and then he slept.
D.
Rusty wanted to get a good grade on the test, so he studied for several hours.