Which is true regarding Queueing Theory:

	A.	Entertaining customers while waiting does not reduce the actual waiting time.
	B.	If you have many cash registers, one line per cash register performs better than one extremely long line that is shared by all registers.
	C.	If a business has long lines, they should hire more workers since they must not have enough capacity.
	D.	Successful businesses figure out how to keep all employees busy 100% of the time (or as close as possible).