Mike was interested in improving his management skills, he wouldn’t become so successful now.

A. If Mike hadn’t been interested in improving his management skills, he wouldn't have become so successful now.

B. Unless Mike had been interested in improving his management skills, he wouldn’t become so successful now.

C. Mike was so interested in improving his management skills that he wouldn’t become so successful now.

D. If Mike weren’t interested in improving his management skills, he wouldn’t become so successful now.