A customer wants their callers to have greater control over their interactions when they reach their contact centers. They want their callers to be able to get a callback when the next agent is available, or schedule a callback for a day/time that is most convenient. Callers should also be able to continue to hold. Avaya Callback Assist (CBA) gives a customer control of their interaction with the contact center by providing the customer with the estimated wait time and options.

Avaya Callback Assist (CBA) can be installed in which three different environments based on these business requirements? (Choose three.)