The Volume of the Surface Bounded by the Graph Of z

Multiple Choice

The volume of the surface bounded by the graph of $z = e ^ { x + y }$ with $0 \leq x \leq 1,0 \leq y \leq 1$ is

A) $e - 1$
B) $e + 1$
C) $( e - 1 ) ^ { 2 }$
D) $( e + 1 ) ^ { 2 }$
E) $( e + 2 ) ^ { 2 }$