A simulation project models an accident and emergency department at a hospital with the objective of reducing the time that patients have to wait to be seen by the doctor. Data is obtained for the arrival times of patients, the waiting times of patients at different stages in the process, and the process times for dealing with the patients. How should the waiting time data be used in the simulation project? a. Include in the model as an attribute of the patient b. White box validation c. Black box validation d. Include in the model in the details of the queues for waiting patients e. It should not be used