Which three options are switchport configuration that can always avoid duplex mismatch errors between two switches?

Which three options are switchport configuration that can always avoid duplex mismatch errors between two switches? (Choose three.)
A. Set both sides of the connection to half duplex.
B. Set one side of the connection to auto-negotiate and the other side to full duplex.
C. Set both sides of the connection to auto-negotiate.
D. Set one side of the connection to auto-negotiate and the other side to half duplex.
E. Set one side of the connection to full ruplex and the other side to half duplex.
F. Set both sides of the connection to full duplex.