Choose the sentence that best combines each pair of sentences in the following question.
Laura practised playing the instrument a lot. She could hardly improve her performance.
Hardly had Laura practised playing the instrument a lot when she could improve her performance. Had Laura practised playing the instrument a lot, she could have performed much better. However much Laura practised playing the instrument, she could hardly perform any better. As soon as Laura practised playing the instrument a lot, she could perform much better.