Let $x = u + 3$ And $y = v - 4 .$

Multiple Choice

Let $x = u + 3$ and $y = v - 4 .$ Then $\frac { \partial ( x , y ) } { \partial ( u , v ) }$ is

A) $w$
B) 1
C) $u$
D) $v$
E) $- w$