GMAT Sentence Correction (SC) | Sentence correction - Modifiers

Danica Patrick is a notable racer on the Indy circuit,which once again shows that women can compete with men.


(A) which once again shows that women can compete with men
(B) which once again shows that women are able to complete with men
(C) a fact which once again shows that women can compete with men
(D) showing once again that women can compete with men
(E) proof once again that women can compete with men

Am confused between option C & D


Source :- Optimus prep