The Elasticity of the Compensated Demand Curve $\left( e _ { x , p _ { \lambda } } \right)$

The elasticity of the compensated demand curve $\left( e _ { x , p _ { \lambda } } \right)$ can be computed as

A) $l - e _ { x , p _ { \lambda } }$
B) $l - e _ { x , p _ { x } } - e _ { x , p _ { y } }$
C) $s _ { x } e _ { x , I } + e _ { x, p _ { { x } } }$
D) $s _ { x } \left( e _ { x , I } - e _ { x , p _ { x } } \right) .$