Refer to the exhibit. Why is user authentication being rejected?
A. The TACACS+ server expects “user”, but the NT client sends “domain/user”.
B. The TACACS+ server refuses the user because the user is set up for CHAP.
C. The TACACS+ server is down, and the user is in the local database.
D. The TACACS+ server is down, and the user is not in the local database.
