Solve the System by Using Either the Substitution Method or the Elimination-By-Addition

Multiple Choice

Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. $$\left( \begin{array} { c } 6 x - 2 y = 6 \\12 x - 4 y = - 5\end{array} \right)$$

A) (1, 2)
B) (3, -1)
C) (3, 2)
D) dependent
E) inconsistent