Consider the elementary matrices below. 1 For A = 0 0 det (A) = 1 0 0 For B = 0 k 0 0 0 1 det (B) = 1 For C = 0 0 0 0 0 1 1 0 det (C) = 0 0 1 k 01 Now if M is an arbitrary matrix with det (M) = 4, then det (BM) =

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