A user enters ptp clock boundary domain 0 in a Cisco ASR 901 router from the global config
prompt and it fails. According to Cisco best practices, what is the cause?

A.
Domain 0 is reserved and cannot be used for a boundary clock.

B.
The command syntax is incorrect for a Cisco ASR 901.

C.
The Cisco ASR 901 cannot act as boundary clock.

D.
The ASR 901 is missing the required feature license.