GMAT Sentence Correction (SC) | Like Edvard Grieg, whom the Scandinavians long refused

Like Edvard Grieg, whom the Scandinavians long refused to recognize , the Italians’ disregard for Verdi persisted for a decade after his critical acclaim in France and Austria.

(A)Like Edvard Grieg , whom the Scandinavians long refused to recognize,
(B)Like Edvard Grieg, who the Scandinavians long refused to recognize,
(C)Just as Edvard Grieg was long refused recognition by the Scandinavians,
(D)