why did i get this one wrong

A pediatric practice has 5 physicians. Historically, patients were assigned to one physician, and the same physician always treated these patients. For example, Alice's patients always visited her (for "well visits" and "sick visits") and never interacted with the other physicians. However, they have decided to change how they see patients. Now patients will be seen by whoever is available (i.., not treating patients). Based on our discussion of queuing theory, which of the three outcomes below are likely to occur due to this change? QO The coefficient of variation of patient interarrival times will increase. ) The utilization of each physician will increase. QO The average number of patients actually with a physician (that is, "inventory in process") will increase. oO The average waiting time will decrease a o All these answers are correct