Table 71 the Figure Above Shows the Call Routing Process

Multiple Choice

Table 7.1 The figure above shows the call routing process for a customer service call center.Incoming calls are routed,depending on the complexity of the caller's request.Simple request are routed to work center B,while the more complex calls are routed to work center C (which also takes simple calls when not busy) .The numbers in parentheses are the time in minutes for each step of the process.
-Use the information in Table 7.1.What is the process bottleneck?

A) A
B) B and C together
C) D
D) E