Which of the Following Occurs Most Likely Due to Confirmation

Multiple Choice

Which of the following occurs most likely due to confirmation bias?

A) A company conducts monthly performance reviews to evaluate its employees.
B) A customer demands a proof statement from the salesperson.
C) A manager believes his actions are correct, though they are highly unpopular.
D) A manager considers female workers to be less productive than the male workers.
E) A teacher assigns moderate grades to all her students, though there is a vast difference in performance.