When Cisco Extension Mobility is implemented, how is the audio source for the MOH selected?

When Cisco Extension Mobility is implemented, how is the audio source for the MOH selected?

A.
The audio source that is configured at the user device profile is selected.

B.
The audio source that is configured at the home phone of the user is selected.

C.
The audio source that is configured at the physical phone used for the Cisco Extension Mobility login is selected.

D.
The audio source that is configured in the IP Voice Media Streaming parameters is selected.

Explanation:
Ok, see 4-47: Cisco Extension Mobility Configuration Elements

The device profile is configured with all the user-specific settings that are found at the device
level of an IP phone (user MOH audio source, phone button templates, softkey templates, user
locales, DND and privacy settings, and phone service subscriptions) and all phone buttons
(lines, speed dials, and so on). One or more device profiles are applied to an end user, in the
End User Configuration window.