Refer to the exhibit.

DSW1# sh spanning-tree int fa1/0/7 Vlan Role Sts Cost Prio.Nbr Type -------------- ---- --- -------- --------- ------------------------ VLAN0001 Desg FWD 2 128.9 P2p Edge VLAN0010 Desg FWD 2 128.9 P2p Edge VLAN0020 Desg FWD 2 128.9 P2p Edge VLAN0030 Desg FWD 2 128.9 P2p Edge VLAN0040 Desg FWD 2 128.9 P2p Edge

How was spanning-tree configured on this interface?

A.	By entering the command spanning-tree portfast trunk in the interface configuration mode.
B.	By entering the command spanning-tree mst1 vlan 10,20,30,40 in the global configuration mode.
C.	By entering the command spanning-tree portfast in the interface configuration mode.
D.	By entering the command spanning-tree vlan 10,20,30,40 root primary in the interface configuration mode.