$2.$ A ball is dropped from an initial height h$.$ As it bounces off the floor, its speed is $90$ percent of what it was just before it hits the floor. To what height a ball will rise? Neglect air friction.

$($A$)0\mathrm{.}61$ h

$($B$)0\mathrm{.}71$ h

$($C$)0\mathrm{.}81$ h

$($D$)0\mathrm{.}91$ h