In Ethernet networks, duplex mismatches will lower performance. Which error statistics can be seen if a duplex mismatch is present?（）

• A、collisions on the full-duplex side; runts on the half-duplex side
• B、collisions on the full-duplex side; collisions on the half-duplex side
• C、collisions on the half-duplex side; framing errors on the full-duplex side
• D、collisions on the half-duplex side; giants on the full-duplex side