Two objects are moving at equal speed along a level, frictionless surface. The second object has twice the mass of the first object. They both slide up the same frictionless incline plane. Which object rises to a greater height?

Object $1$ rises to the greater height because it weighs less. Object $2$ rises to the greater height because it possesses a larger amount of kinetic energy. Object $1$ rises to the greater height because it possesses a smaller amount of kinetic energy. Object $2$ rises to the greater height because it contains more mass. The two objects rise to the same height.