Had I known more about computer programming, I would have worked for a computer company. 

A. A better knowledge of computer programming will help me find a job in a computer company.

B. I didn't know much about computer programming, so I didn't work for a computer company.

C. I wish I knew more about computer programming and could work for a computer company.

D. Knowing more about computer programming, I would find a job in a computer company.