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.