Rewrite sentences without changing the meaning

Mike graduated with a good degree. However, he joined the ranks of the unemployed.

• A. 
  Mike joined ranks of the unemployed because he graduated with a good degree.
• B. 
  If Mike graduated with a good degree, he would joined the ranks of the unemployed.
• C. 
  Although Mike graduated with a good degree, he joined the ranks of the unemployed.
• D. 
  That Mike graduated with a good degree helped him joined the ranks of the unemployed.