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The correct answer is d) 6762 J.
Potential energy can be calculated using the formula: PE = mgh, where m is the mass of the object in kilograms, g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the object in meters.
Plugging in the given values:
PE = (115 kg)(9.8 m/s^2)(6 m) = 6762 J