Refer to the exhibit. You are setting up a 2-gigabit EtherChannel. Following IEEE standards, the exhibit shows your configuration in a local switch1. However, EtherChannel is not coming up. Which one of these statements could be a possible reason?
A.
EtherChannel is only available in Cisco equipment.
B.
The customer side is supposed to be running PAgP, which is a Cisco standard.
C.
PAgP is not an IEEE standard. VRRP should be used.
D.
The configuration on switch1 needs to be modified to use LACP.