Refer to the Exhibit. Which effect of this configuration is true?
A. R1 synchronizes with systems that include authentication key 5 in their packets.
B. R1 acts as an authoritative clock with a priority ID of 1.
C. R1 acts as an authoritative clock at stratum 5.
D. R1 is the NTP client for a stratum 1 server.
Correct Answer: C