How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?

a
It allows a smaller force to be applied over a shorter distance.
b
It allows a smaller force to be applied over a longer distance.
c
It allows a larger force to be applied over a shorter distance.
d
It allows a larger force to be applied over a longer distance.

b

It allows a smaller force to be applied over a longer distance.