Which spanning-tree feature is configured on this interface?

Refer to the exhibit.

Which spanning-tree feature is configured on this interface?
A . The command spanning-tree mst1 vlan 10, 20, 30, 40 in the global configuration mode was entered.
B . The command spanning-tree portfast trunk in the interface configuration mode was entered.
C . The command spanning-tree vlan 10, 20, 30, 40 root primary in the interface configuration mode for faster convergence.
D . The command shut then a no shutdown in the interface configuration mode was entered.
E . The command spanning-tree portfast in the interface configuration mode was entered.

View Answer

Answer: B