Let A be a 4 x 4 matrix with det(A) = −10. 1. If the matrix B is obtained from A by adding 7 times the fourth row to the first, then det (B) = 2. If the matrix C is obtained from A by swapping the first and fourth rows, then det(C)= 3. If the matrix D is obtained from A by multiplying the first row by 7, then det (D) =

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