Paul is seldom absent from work. However, an illness the previous week forced him to miss work for a day, and his supervisor evaluated his performance less positively than was warranted. This best illustrates the supervisor's vulnerability to:.

C)recency errors.

Explanation:

Paul is seldom absent from work. However, an illness the previous week forced him to miss work for a day, and his supervisor evaluated his performance less positively than was warranted. This best illustrates the supervisor's vulnerability to recency errors.  Recency error occurs when an employee or applicant is rated based on his or her most recent occurrence or performance, not taking into consideration the employees previous performance.

Paul's supervisor accessed him based purely on his most recent poor performance and did not consider is his previous good performance, he committed recency error.