Even though his predilection for initiating legal proceedings against his detractors was common knowledge and unlikely to upset his supporters, the politician decided to press charges against his opponent.

(A) Even though his predilection for initiating legal proceedings against his detractors was common knowledge and unlikely to upset his supporters
(B) Notwithstanding his commonly known predilection for initiating legal proceedings against his detractors, which was unlikely to upset his supporters
(C) His predilection for initiating legal proceedings against his detractors common knowledge and unlikely to upset his supporters
(D) Despite his commonly known predilection, which was unlikely to upset his supporters, for initiating legal proceedings against his detractors
(E) Because his predilection for initiating legal proceedings against his detractors that was common knowledge was unlikely to upset his supporters

OA: C
What's wrong with options B and D? Can any experts help?