Which configuration enables a successful login?

Refer to the exhibit.

An engineer tries to log in to router R1 .

Which configuration enables a successful login?
A . R1#username admin privilege 15
aaa authorization exec default local
netconf-yang
B . R1# username admin privilege 15
aaa authorization exec default local
C . R1# aaa new-model
aaa authorization exec default local
enable aaa admin privilege 15
D . R1#netconf-yang
username admin privilege 15 secret cisco123
aaa new-model
aaa authorization exec default local