Sentence Correction

One of the world's most renowned abstract painters, critics once mocked Piet Mondrian for his technique of splattering paint on canvases

(A) critics once mocked Piet Mondrian
(B) Piet Mondrian was mocked by critics once
(C) Piet Mondrian had been once mocked by critics
(D) Piet Mondrian was once mocked by critics
(E) Piet Mondrian once mocked by critics

OA later

Tough call between C and D. I would choose C, though I would wait for an expert to comment on this.