Let $A=\left[\begin{array}{ccc}1 & -1 & 2 \\ 0 & 3 & 4\end{array}\right]$,$B=\left[\begin{array}{ccc}4 & 0 & -3 \\ -1 & -2 & -3\end{array}\right]$ and $C=\left[\begin{array}{cccc}2 & -3 & 0 & 1 \\ 5 & -1 & -4 & 2 \\ -1 & 0 & 0 & 3\end{array}\right]$,what is $A^T B$ ?

  • A
    $\left[\begin{array}{ccc}4 & 0 & -3 \\ -7 & -6 & -6 \\ 4 & -8 & -18\end{array}\right]$
  • B
    $A^T B$ is not defined
  • C
    $\left[\begin{array}{ccc}4 & -7 & 4 \\ 0 & -6 & -8 \\ -3 & 12 & 6\end{array}\right]$
  • D
    $A^T B=0$

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