The Surface Area of the Surface Cut From $z = x + 2 y$

Multiple Choice

The surface area of the surface cut from $z = x + 2 y$ by x = 0, y = 0, x = 1, and y = 2 is

A) $6 \sqrt { 8 }$
B) $2 \sqrt { 6 }$
C) $\sqrt { 6 }$
D) 18
E) $2 \sqrt { 1633 }$