Answer:
decrease the area in the second cylinder
Step-by-step explanation:
In a two-cylinders pneumatic system, the pressure exerted on the first cylinder is equal to the pressure on the second cylinder:

We can rewrite the pressure as product between force (F) and area (A) of the cylinder:

In this system, the output force should be 4 times the input force:

Substituting into the previous equation, we get:

This means that the area of the second cylinder must be 1/4 of the area of the first cylinder, so the correct answer is
decrease the area in the second cylinder