Solve the System of Equations by the Addition Method $\left\{ \begin{array} { l } - 3 x - 7 y = - 1 \\- 7 x - 4 y = 10\end{array} \right.$

Multiple Choice

Solve the system of equations by the addition method.
- $\left\{ \begin{array} { l } - 3 x - 7 y = - 1 \\- 7 x - 4 y = 10\end{array} \right.$

A) $( 2,1 )$
B) $( 2 , - 1 )$
C) $( - 2 , - 1 )$
D) $( - 2,1 )$