A. Call Center Elite Multichannel application displays an error message because the new agent isn't known in the system

B. Call Center Elite Multichannel application displays no error message because the maximum number of licensed concurrent agents is not logged in

C. Call Center Elite Multichannel application displays an error message because the number of licensed agents has exceeded the maximum number allowed

D. Call Center Elite Multichannel application displays an error message because the number of licensed agents is not the same as the number that are logged in