8. 以下哪一段程式碼無法正確產生N列M行的二維list？
(A) arr = [[0 for _ in range(M)] for _ in range(N)]
(B) arr = [[0] * M] * N
(C) arr = [] for _ in range(N): arr.append([0] * M)
(D)以上皆可正確產生二維list

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