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What is the correct answer?


In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if

A. Complete details of items in, waiting line are known

B. Arrival and waiting times are known and can be grouped to form a waiting line model

C. All variables and constants are known and form a linear equation

D. The laws governing arrivals, service times, and the order in which the arriving units are taken into source are known