The forklift exerts a 1,500.0 n force on the box and moves it 3.00 m forward to the stack. how much work does the forklift do against the force of gravity?

a) 1.50 × 10^3 j

b) 0.00 j

c) 500 j

d) 4.50 × 10^3 j

i think it is d, but i can also justify b, !