Let $\mathbf { F } ( x , y , z ) = 2 z \mathbf { i } + 3 x \mathbf { j } + 4 z \mathbf { k }$

Multiple Choice

Let $\mathbf { F } ( x , y , z ) = 2 z \mathbf { i } + 3 x \mathbf { j } + 4 z \mathbf { k }$ and C be the boundary of $z = 4 - x ^ { 2 } - y ^ { 2 }$ above z = 0. Using Stokes' Theorem, $\int _ { C } \mathbf { F } \cdot \mathbf { T } d s$ is

A) 12?
B) 15?
C) 18?
D) 24?
E) 28?