Answer
We can rank the points in order of kinetic energy, from greatest to least:
$E \gt C \gt B = D \gt A$
Work Step by Step
By conservation of energy, the sum of the gravitational potential energy and the kinetic energy is constant for all points in the motion. If the skier is at a higher vertical position, the gravitational potential energy is greater, and so the kinetic energy must be smaller. The kinetic energy is a minimum at the highest point, and the kinetic energy is a maximum at the lowest point.
We can rank the points in order of kinetic energy, from greatest to least:
$E \gt C \gt B = D \gt A$
