the fact（）we may not be able to directly assist you does not mean your complaint isn.t valid. (A) which (B) whom (C) who (D) that

the fact（）we may not be able to directly assist you does not mean your complaint isn.t valid.
(A) which
(B) whom
(C) who
(D) that

出自：南阳师范学院-学前教育-大学英语（一）

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