She didn’t stop learning German until the...

Câu hỏi: She didn’t stop learning German until the age of 24.

A. It was not until the age of 24 that she stopped learning German.

B. It was not until she was 24 that she stop learning German.

C. It was not until the age of 24 that she did not stop learning German.

D. She  didn’t learn German until the age of 24.