Which two statements about late collisions are true? (Choose two.)

Which two statements about late collisions are true? (Choose two.)
A . They may indicate a duplex mismatch.
B . By definition, they occur after the 512th bit of the frame has been transmitted.
C . They indicate received frames that did not pass the FCS match.
D . They are frames that exceed 1518 bytes.
E . They occur when CRC errors and interference occur on the cable.

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Answer: AB