Confucian thought that a harmonious society is built on Five Key Relationships, they are :
A、ruler-subject, parent-child, husband-wife, elder sibling-younger sibling, friend-friend
B、ruler-subject, parent-child, elder sibling-younger sibling, friend-friend, teacher-student
C、parent-child, husband-wife, elder sibling-younger sibling, friend-friend, teacher-student
D、ruler-subject, husband-wife, elder sibling-younger sibling, friend-friend, teacher-student