One of the ways that simple machines make work easier is that they

a. multiply the force
b. use less output of energy
c. decrease the weight of the resistance
d. multiply work

A. Multiply the force

Explanation:

Simple machines are used to make our work easier. They either change the direction of force or multiply the force or both. Simple machines are lever, wedge, pulley, screw etc.

Example of how a simple machine multiplies force:

In a lever, effort is put at a longer end which is able to lift a heavier load at the short distance.