Question

potential and kinetic energy select the point where the roller coaster cars have the lowest potential energy.

Explanation:

Step1: Recall potential - energy formula

The gravitational potential energy formula is $U = mgh$, where $m$ is mass, $g$ is gravitational acceleration, and $h$ is height. For a given roller - coaster car (constant $m$) and a constant $g$ on Earth, potential energy depends only on height $h$.

Step2: Identify the lowest - height point

Looking at the roller - coaster track, point B has the lowest height among points A, B, and C.

Answer:

B