ANSWER
C. increases
Step-by-step explanation
Work is a form of energy. If work is positive it means that work is being done on an object while, if it's negative, it means that the object is doing work.
The net work is the sum of all the works of the system. Therefore, a net work is being done on this object, because it is positive.
Kinetic energy is the energy the object has when it's moving.
If work is being done on the object, then it is moving. Therefore, kinetic energy of the object increases.