Exam 210-060 Question id=991 Provide End User Support

The receptionist has a Cisco 7965 phone with 24-button side-car configuration. 
The side-car button of the phone does not light up when the line is in use. 
Which phone configuration is missing?

A. Subscriber calling search space
B. Location
C. BLF audible alert setting
D. Phone button template

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