A Solid Sphere of Mass 4 $\degree$ It Rolls to the Bottom Without Slipping

Multiple Choice

A solid sphere of mass 4.0 kg and radius 0.12 m is at rest at the top of a ramp inclined 15 $\degree$ .It rolls to the bottom without slipping.The upper end of the ramp is 1.2 m higher than the lower end.Find the sphere's total kinetic energy when it reaches the bottom.

A) 70 J
B) 47 J
C) 18 J
D) 8.8 J