Calculate the Circulation of the Field F Around the Closed $\le$

Multiple Choice

Calculate the circulation of the field F around the closed curve C.
-F = xyi + 5j , curve C is r(t) = 3 cos ti + 3 sin tj, 0 $\le$ t $\le$ 2 $\pi$

A) 16
B) 4
C) 10
D) 0