Solve, Using the Substitution Method, and Check $\begin{array} { c } 3 x + y = 6 \\y = 2 x\end{array}$

Multiple Choice

Solve, using the substitution method, and check. $\begin{array} { c } 3 x + y = 6 \\y = 2 x\end{array}$

A) (2.2, 4.4)
B) (3.8, 7.6)
C) (6, 12)
D) (1.2, 2.4)
E) (3, 6)