Answer
a. C, B=D, A.
b. C, B=D, A.
c. A, B=D, C.
Work Step by Step
a. Momentum is mv. The ball is moving fastest at point C where it has dropped the most, and slowest at point A. It has the same speed at points B and D.
b. KE is $\frac{1}{2}mv^{2}$. The ball is moving fastest at point C where it has dropped the most, and has the most KE there. It is moving slowest at point A and has the least KE there. It has the same speed at points B and D.
c. PE + KE = constant.
PE is greatest where KE is least, and PE is the least where KE is the greatest.