Which two elements are required in order to set up auto-attendant with basic IVR applications on Cisco Unity Express? (Choose two.)

IVR session licenses are associated with advanced IVR features, not the basic auto-attendant functionality built into Cisco Unity Express.

Triggers are mandatory because they define the event or phone number that activates the auto-attendant script - without a trigger, the IVR application has no mechanism to start when a call arrives.

Mailbox licenses are required for voicemail subscriber accounts and are unrelated to auto-attendant or IVR application configuration.

A call control group is not a component required for configuring or running auto-attendant and IVR applications in Cisco Unity Express.

Prompts are the audio recording files played to callers during IVR navigation; they are required for the auto-attendant to communicate menu options and instructions to the caller.