Answer:
A. Simple ranking
Explanation:
Simple ranking is the simplest way to assess jobs includes rating each job compared to all other workers, usually based on the overall difficulty. In this method, employees areranked from best to worst in a group.
Donna wants to compare her employee John against other employees to assess his job performance, SIMPLE RANKING is best suited for measuring the overall performance. This is because it is easier, faster and this method ranks jobs in order based on each job's perceived value in relation to the others.