Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
She didn’t understand the benefits of volunteering until she joined this club
A. Not until she joined this club did she understand the benefits of volunte
B. It was not until she joined this club did she understand the benefits of volunteering
C. Not until did she join this club, she understood the benefits of volunteering
D. Not until she joined this club that she understood the benefits of volunteering