If Possible,find AB and State the Order of the Result

If possible,find AB and state the order of the result.​ $$A = \left[ \begin{array} { c c c } 5 & 0 & 0 \\0 & 4 & 0 \\0 & 0 & - 3\end{array} \right] , B = \left[ \begin{array} { c c c } 5 & 0 & 0 \\0 & - 5 & 0 \\0 & 0 & 4\end{array} \right]$$ ​

A) $$\left[ \begin{array} { c c c } 25 & 0 & 0 \\0 & - 20 & 0 \\0 & 0 & - 12\end{array} \right]$$ Order: 3 × 3
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B) $$\left[ \begin{array} { c c c } 23 & 0 & 0 \\0 & - 20 & 0 \\0 & 0 & - 12\end{array} \right]$$ Order: 3 × 3
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C) $$\left[ \begin{array} { c c c } 27 & 0 & 0 \\0 & - 20 & 0 \\0 & 0 & - 12\end{array} \right]$$ Order: 3 × 3
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D) $$\left[ \begin{array} { c c c } 21 & 0 & 0 \\0 & - 20 & 0 \\0 & 0 & - 12\end{array} \right]$$ Order: 3 × 3
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E) $$\left[ \begin{array} { c c c } 29 & 0 & 0 \\0 & - 20 & 0 \\0 & 0 & - 12\end{array} \right]$$ Order: 3 × 3
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