Which of the Following Is an Action That Would Motivate

Which of the following is an action that would motivate a patient to not miss an appointment?

A) Schedule the patient to fit into open office time periods. 
B) Do not allow the patient many time choices. 
C) Do not ask for payment when the patient is leaving. 
D) Remind the patient at least twice of the next appointment. 
E) Give the patient an appointment card or notify the patient by telephone the day before.