Answer:
The correct option is;
A. Waiting at the top of the stairs for the roller coaster to pull into the station
Step-by-step explanation:
Here we analyze each of the options
A. Waiting at the top of the stairs for the roller coaster to pull into the station
In the above case we have an initial energy being the energy by virtue of height position, which is potential energy
B. Climbing into the car
Here, we have motion energy, (climbing) which is kinetic form of energy
C. Pulling down the harness
The above is also a form of kinetic energy. Energy of motion (pulling)
D. The roller coaster going up the first hill
Here we have a form of kinetic energy. Energy of motion (going up).