What makes the use of the sniffer command on the FortiSwitch CLI unreliable on__port__23?

What makes the use of the sniffer command on the FortiSwitch CLI unreliable onport23?

Refer to the diagnostic output:

What makes the use of the sniffer command on the FortiSwitch CLI unreliable on__port__23?
A . The types of packets captured is limited.
B . Just the port egress payloads are printed on CLI.
C . Only untagged VLAN traffic can be captured.
D . The switch port might be used as a trunk member

Answer: A