Which of the following has the largest gravitational potential energy a. a 10kg dog running down the street at 30mph b. a tightrope walker slowly crossing niagara falls c. a 0.02kg bullet moving down the barrel at 800mph d. a semi truck parked in a parking lot

Gravitational potential energy = mgh

Thus it is clear the higher the mass and height, the  more will be the gravitational potential energy

Thus option B is the correct answer

are there options? cause you ain’t. real specific

be subject to a force andchange its motion