Which of the Following Choices Constitutes a Simultaneous Solution to These

Multiple Choice

Which of the following choices constitutes a simultaneous solution to these equations? $$\begin{array} { l } 3 \mathrm { x } + 4 \mathrm { y } = 10 \\5 \mathrm { x } + 4 \mathrm { y } = 14\end{array}$$

A) x = 2, y = .5
B) x = 4, y = -.5
C) x = 2, y = 1
D) x = y
E) y = 2x