In order to increase the amount of work completed, it is necessary to decrease the force applied to an object. decrease the time to do the work. increase the time to do the work. increase the force applied to the object.

 The answer to your question is: increase the force applied to the object.

Two items are provided as a basis for that conclusion:
1. According to Newton's Second Law of Motion, the formula for finding force is: F = ma
where F is the force,
m is the mass of an object,
and a is the acceleration of the object.

And 2: work = force x distance or W = F x d.