Perform the Operation or Operations When Possible $\left[ \begin{array} { l l l } - 2 & 8 & 4 \end{array} \right] - \left[ \begin{array} { l l } 4 & 3 \end{array} \right]$

Perform the operation or operations when possible.
- $\left[ \begin{array} { l l l } - 2 & 8 & 4 \end{array} \right] - \left[ \begin{array} { l l } 4 & 3 \end{array} \right]$

A) They cannot be subtracted.
B) $\left[ \begin{array} { l l l } - 6 & 8 & 1 \end{array} \right]$
C) $\left[ \begin{array} { l l l } - 6 & 5 & 1 \end{array} \right]$
D) $\left[ \begin{array} { l l l } - 6 & 5 & 4 \end{array} \right]$