Find the Indicated Sum or Difference, If It Is Defined $\left[ \begin{array} { l l l } - 2 & 9 & 1 \end{array} \right] - \left[ \begin{array} { l l } 4 & 3 \end{array} \right]$

Multiple Choice

Find the indicated sum or difference, if it is defined.
- $\left[ \begin{array} { l l l } - 2 & 9 & 1 \end{array} \right] - \left[ \begin{array} { l l } 4 & 3 \end{array} \right]$

A) $\left[ \begin{array} { l l l } - 6 & 9 & - 2 \end{array} \right]$
B) not defined
C) $\left[ \begin{array} { l l l } - 6 & 6 & - 2 \end{array} \right]$
D) $\left[ \begin{array} { l l l } - 6 & 6 & 1 \end{array} \right]$