For now, I'd say D is the only correct answer.
In the online quiz, each correct answer had a tick box available.
Note that there is only one correct answer to each question.
There is a correct answer to this question, though.
The correct answer she was looking for is a giant ego.
Finding the correct answer was easy enough once I read the material.
He finally arrived at the correct answer using the process of elimination.
It took hours to get at the correct answer to the puzzle.
After weeks of trial, her computation finally yielded the correct answer.
If you sum these two values, you will get the correct answer.
He took a moment to make a guess before checking the correct answer.
She felt a rush of excitement as the buzzer announced her correct answer.
Finding the correct answer was confusing because of misleading information.