Answer: Having the right number of job classes gives a framework for setting fair and equitable compensation for similar jobs and eliminates errors from job evaluations.
Step-by-step explanation:
From the information given, the statement that best explains why it is important to have the proper number of job classes is that "Having the right number of job classes gives a framework for setting fair and equitable compensation for similar jobs and eliminates errors from job evaluations".
Option B is wrong because having the right number of job classes doesn't mean that the departments are interpreting job evaluations properly.
Option C is wrong because having the right number of job classes doesn't eliminate the need for continuous job evaluations as employees progress on their career path.
Also, having the right number of job classes doesn't mean that it'll be easy to explain to employees why their pay is at a certain level.
Therefore, the correct option is A.