Many professions, including police officers and firefighters, use fitness evaluations
a. to determine pay raisesb. to rank employees from most to least fitc. as a criteria for hiringd. to decide who should be fired

C) As a criteria for hiring

Explanation:

The fitness evaluation it´s the physical test to accomplish when a person is applying to jobs of this kind.  It´s really important since decent-good general physical conditions are required for these stressful, versatile and ¨moved¨ activities.

Being a police officer or a firefighter (between others) are not easy tasks, require optimal health conditions in all the aspects to perform all the different activities in a proper and capable way (at least in the admission tests for newcomers, since it´s common to see overweight veteran policemen for saying an example).

Centered attention, quick reactions, reflexes, adaptability, strength, speed and other qualities are attributed to a fit, healthy and active person,  due this, they have to be capable at least to approve certain physical parameters placed in the admission tests, that works as preparation since more extreme situations would be presented in a ¨real life¨ scenario.