The network administrator configures as shown in the figure on the Huawei router RTA, if a user needs to be authenticated in the authentication domain "huawei", which of the following descriptions is correct?

The network administrator configures as shown in the figure on the Huawei router RTA, if a user needs to be authenticated in the authentication domain "huawei", which of the following descriptions is correct?

[RTA] aaa

[RTA-aaa] domain huawei

[RTA-aaa-domain huawei] authentication-scheme au1

[RTA-aaa domain-huawei] authentication-scheme au2
A . "authentication-scheme au1" authentication will be used
B . "authentication-scheme au1" authentication will be used, if "au1" is deleted, "au2" authentication will be used
C . "authentication-scheme au2" authentication will be used, if "au2" is deleted, "au1" authentication will be used
D . "authentication-scheme au2" authentication will be used

Answer: C