Using Green's Theorem, Find the Outward Flux of F Across $\frac { 15 } { 2 }$

Multiple Choice

Using Green's Theorem, find the outward flux of F across the closed curve C.
-F = xyi + xj; C is the triangle with vertices at (0, 0) , (5, 0) , and (0, 3)

A) 0
B) $\frac { 15 } { 2 }$
C) 20
D) $- 5$