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.