Let $x = e ^ { u } \cos v$ And $y = e ^ { u } \sin v$

Multiple Choice

Let $x = e ^ { u } \cos v$ and $y = e ^ { u } \sin v$ Then $\frac { \partial ( x , y ) } { \partial ( u , v ) }$ is

A) $u e ^ { u }$
B) $\boldsymbol { u }$
C) $u$
D) $e ^ { 2 u }$
E) $- e ^ { 2 u }$