Answer:
The correct answer is option d.
Step-by-step explanation:
Mechanical advantage of a machine is defined as ratio of force exerted by the machine to the force exerted on the machine.

Here we have applied 100.0 N of force on a machine and machine exerted the force 20.0 N in return.So, the mechanical advantage of the machine is ;
Force exerted by machine = 20.0 N
Force exerted on machine = 100.0 N

0.200 is the mechanical advantage of the machine.