Answer:
C
Step-by-step explanation:
Rather than perform 8 matrix multiplications, it seemed to be easier to let a spreadsheet do the multiplications and the comparisons. We find the pair in choice C are not commutative with respect to multiplication.
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The function used to multiply the matrices is MMULT(range1, range2). It occupies the upper left corner cell of the output matrix. The difference function here is simply a cell-by-cell subtraction. Conditional formatting is used to highlight the non-zero difference.
