79. Two stones, one of mass m and the other of mass 2m, are thrown directly upward withthe same velocity at the same time from ground level. Assume the air resistance can beneglected. Which statement about these stones is true?
(A) Both stones will reach the same height because they initially had the same amountof kinetic energy.
(B) The heavier stone will go twice as high as the lighter one because it initially hadtwice as much kinetic energy.
(C) At their highest point, both stones will have the same gravitational potential energybecause they reach the same height.
(D) At its highest point, the heavier stone will have twice as much gravitational potentialenergy as the lighter one because it is twice as heavy.