Which command do you use to configure EtherChannel guard feature?

Which command do you use to configure EtherChannel guard feature?
A . SW(config)# spanning-tree etherchannel guard misconfig
B . SW(config)# portchannel etherchannel guard misconfig
C . SW(config-if)# portchannel etherchannel guard misconfig
D . SW(config-if)# spanning-tree etherchannel guard misconfig

Answer: A