Choose the sentence A, B, C, or D which is closest in meaning to the first sentence of each of the questions
Without his help, she would not have managed to solve the problem
A.She managed to solve the problem on her own.
B.She's unable to solve the problem without his help.
C.If he hadn't helped her, she wouldn't have been able to solve the problem.
D.If he helps her, she'll be able to solve the problem.