Which change would cause the largest increase in a mountain climber’s gravitational potential energy?

Gravitational potential energy is weight multiplied by height: GPE = weight × height. In choice A, both the weight and height double, so the climber’s potential energy becomes 2 × 2 = 4 times as large. The other choices make it 1, 1, or 1/4 times the original, so carrying twice the weight and climbing twice as high gives the largest increase.

AI-written and checked against the verified answer.