Detailed Answer
Correct answer: (D)
Paired comparison
The paired comparison method involves comparing each employee to every other incumbent, two at a time on a single standard, to determine which is better. A rank order can be obtained by counting the number of times each individual is selected as the better of a pair. An advantage to this approach, over traditional ratings, is that it overcomes the problem of an "elevation set." That is, it forces the assessor to compare the performance of each incumbent to all other incumbents, one by one.