The Most Effective Communication from a Nurse Leader to a Team

The most effective communication from a nurse leader to a team member that is most likely to have a positive outcome would be:

A) "Jane, be sure to get those vital signs recorded on time today."
B) "Jane, I need those vital signs before breakfast."
C) "Jane, please give me a list of those vital signs before breakfast."
D) "Jane, breakfast trays are being served. You need to get those vital signs."