Which three options are switchport config that can always avoid duplex mismatch error between the switches? (Choose Three.)

Which three options are switchport config that can always avoid duplex mismatch error between the switches? (Choose Three.)
A . set both side on auto-negotation
B . set both sides on half-duplex
C . set one side auto and other side half-duplex
D . set both side of connection to full-duplex
E . set one side auto and other side on full-duplex
F . set one side full-duplex and other side half-duplex

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Answer: ABD