Implementing Cisco IP Switched Networks (SWITCH v2-0) (#45)

Refer to the exhibit.

Which effect of this configuration is true?

The switch port continues to negotiate an EtherChannel even when there are configuration discrepancies between the two ports.
Spanning tree blocks EtherChannel formation on the device.
The switch port error disables when a port attempts to form an EtherChannel with a port that has a different configuration.
Spanning tree is disabled if the switch port establishes an EtherChannel.