You are CCNA VOICE associate in Certkey.com. The configuration for Call Park has been set. Users complain that the Call Park softkey does not appear on their phones. How to solve this problem?

A.
You should add park-slot number ephone-dn 5

B.
You should restart the phones.

C.
You should configure park-slot number outside the range of 5XXX numbers.

D.
The call-park command enable needs to be added under telephony-service.