Users can log in to Cisco Extension Mobility, but they cannot log out.
Which action solves this problem?

A.
Subscribe the device profile to Cisco Unified Communications Manager Extension Mobility.

B.
Create a new Cisco Unified Communications Manager Extension Mobility service.

C.
Apply the Cisco Unified Communications Manager Extension Mobility service to the IP phones
that have trouble logging out.

D.
Change or remove the Calling Search Space on the phones that have trouble logging out of
Cisco Unified Communications Manager Extension Mobility.