The Surface Integral $\int \int$ S $x y z d S ,$

Multiple Choice

The surface integral $\int \int$ S $x y z d S ,$ where S is $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } = 9$ and $z \geq 0$ is

A) $- 27 \pi$
B) $27 \pi$
C) $26 \pi$
D) $- 26 \pi$
E) $25 \pi$