If I = $\int$ C $\frac { 1 } { y } d x - \frac { x } { y ^ { 2 } } d y$

Multiple Choice

If I = $\int$ C $\frac { 1 } { y } d x - \frac { x } { y ^ { 2 } } d y$ is independent of the path where C is a curve from (5, -1) to (9, -3) then I is

A) $\pi$
B) 3
C) 2
D) -2
E) -3