Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
Laura practiced playing the instrument a lot. She could hardly improve her performance.
A.Hardly had Laura practiced playing the instrument a lot when she could improve her performance.
B.Had Laura practiced playing the instrument a lot, she could have performed much better.
C.However much Laura practiced playing the instrument, she could hardly perform any better.
D.As soon as Laura practiced playing the instrument a lot, she could perform much better.