Laura practised playing the instrument a lot. She...

Câu hỏi: Laura practised playing the instrument a lot. She could hardly improve her performance.

A. Had Laura practised playing the instrument a lot, she could have performed much better.

B. Hardly had Laura practised playing the instrument a lot when she could improve her performance.

C.  As soon as Laura practised playing the instrument a lot, she could perform much better.

D. However much Laura practised playing the instrument, she could hardly perform any better.