$(11)$ A planet moves around the sun in an elliptical orbit. When Earth is closest to the sun, it is at a distance of $x,$ and has a speed of $v.$ When it is a distance of $4x$ from the sun, its speed is $$

$($A$)\frac{v}{4}$

$($B$)\frac{v}{2}$

$($C$)v$

$($D$)2$ v

$($E$)4v$