Roland and Quan are both on the staff of a car dealership. Roland is always asking colleagues to cover his shifts, but he never returns the favor. Quan often covers shifts for colleagues even though he rarely takes time off himself. Which statement best describes the difference between Roland and Quan?
A. Quan adheres to the company ethics policy, and Roland does not.
B. Quan relies on corporate values, and Roland relies on personal values.
C. Quan is an effective communicator, and Roland is not.
D. Quan is a giver, and Roland is a taker.
E. Quan trusts his colleagues, and Roland does not.