Two objects of the same mass move along the same line in opposite directions. The first mass is moving with speed $v.$ The objects collide, stick together, and move with speed $0\mathrm{.}100v$ in the direction of the velocity of the first mass before the collision. What was the speed of the second mass before the collision?

A$)0\mathrm{.}800$ v

B$)10\mathrm{.}0$ v

C$)0\mathrm{.}900$ v

D$)1\mathrm{.}20$ v

E$)0\mathrm{.}00$ v