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

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

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