A 2-D game stores a triangle's vertices as columns in matrix:

$T=\left[\begin{array}{lll}

1 & 3 & 1 \\

1 & 1 & 4

\end{array}\right]$



A reflection across the x-axis is represented by:

$R=\left[\begin{array}{cc}

1 & 0 \\

0 & -1

\end{array}\right]$



Which matrix represents the transformed triangle?

A$\left[\begin{array}{ccc}

-1 & -3 & -1 \\

1 & 1 & 4

\end{array}\right]$

B$\left[\begin{array}{ccc}

1 & 3 & 1 \\

-1 & -1 & -4

\end{array}\right]$

C$\left[\begin{array}{lll}

1 & 3 & 1 \\

1 & 1 & 4

\end{array}\right]$

DIt is not possible to multiply the two matrices.