Sentence Correction (SC) | Explaining that one of its many difficulties had been the

Explaining that one of its many difficulties had been the recent growing injury list among starting players, the minor league baseball team said it would start a month-long search for better physical trainers and physicians.

(A) its many difficulties had been the recent
(B) its many difficulties has been the recently
(C) its many difficulties is the recently
(D) their many difficulties is the recent
(E) their many difficulties had been the recent