She must do her homework, otherwise her parents won’t...

Câu hỏi: 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 must do her homework, otherwise her parents won't let her go to the party.
A. In case her parents won't let her go to the party, she must do her homework.
B. If her parents will let her go to the party, she does her homework, otherwise.
C. On condition that she must does her homework, her parents will let her go to the party.
D. She must do her homework unless her parents won't let her go to the party.