Final answer:
The statement regarding subjective and informal agency evaluations in smaller companies is true, as they often do not have standardized evaluation metrics. The correct answer to the options given is 'd. none of the above' as evaluations can indeed be subjective, and making such evaluations is not necessarily easy.
Step-by-step explanation:
The initial statement suggests that agency evaluation is often done on a subjective, informal basis, particularly in smaller companies with low advertising budgets. This can be true because in smaller companies, there may not be as many formal procedures and metrics in place. These evaluations rely on individual judgment rather than standardized metrics, making them subjective.
Considering the given options, none directly respond to the factuality of the agency evaluation process being subjective or formal. However, looking closer at the context, the implication is that individual performance cannot be evaluated in a subjective context is false. Subjective evaluations certainly occur but may not be as reliable or consistent as objective measures.
The choice provided in the question ('a', 'b', 'c', 'd') aligns with d. none of the above because the evaluations can be made subjectively, contradicting option 'a,' and performing subjective evaluations is not necessarily easy, contradicting option 'b'.