Using the Divergence Theorem, Find the Outward Flux of F $\le$

Multiple Choice

Using the Divergence Theorem, find the outward flux of F across the boundary of the region D.
-F = (y-x) i + (z-y) j + (z-x) k ; D: the region cut from the solid cylinder + $\le$ 49 by the planes z = 0 and

A) 0
B) -294 $\pi$
C) 294 $\pi$
D) -294