Find the Product ​
A) $$\left[ \begin{array} { c } 13 \\21 \\- 6 \\2\end{array} \right]$$

Multiple Choice

Find the product.​ $$\left[ \begin{array} { c c c c } 2 & 1 & 0 & 0 \\- 1 & 2 & 0 & - 4 \\0 & 0 & 2 & 0 \\0 & 4 & 0 & 2\end{array} \right] \left[ \begin{array} { c } 5 \\3 \\- 3 \\- 5\end{array} \right]$$ ​

A) $$\left[ \begin{array} { c } 13 \\21 \\- 6 \\2\end{array} \right]$$ ​
B) $$\left[ \begin{array} { c c } 13 & 21 \\- 6 & 2\end{array} \right]$$ ​
C) $$\left[ \begin{array} { c } 2 \\- 6 \\21 \\13\end{array} \right]$$ ​
D) $$\left[ \begin{array} { l l l l } 13 & 21 & - 6 & 2\end{array} \right]$$ ​
E) cannot multiply ​