http://classic.7sage.com/lsat_explanations/lsat-69-section-4-question-08/
I picked D, which is wrong, and I kind of knew it would. I could not pick C because the it did not translate to what I needed.
Incompetent----> Does not complete
CP Completes ------> Not incompetent.
But the problem for me here was that not incompetent does not( according to our negation lessons) equal competent right?