Olivia Is Giving Feedback to an Employee Who Hopes to Move

Olivia is giving feedback to an employee who hopes to move into a supervisory role someday. Which statement represents the most effective kind of feedback?

A) "You don't seem very motivated lately."
B) "You need to demonstrate stronger leadership if you want a promotion."
C) "You are well organized, and your co-workers really like you."
D) "Last week, when we had a problem, your comments shifted the team from complaining to problem solving."
E) "When we have problems, you have a great attitude, and that will help you as a supervisor someday."