Why does CSMA / CD increase delayed collisions? incomprehension

lichao_ccie

What are two reasons that cause late collisions to increment on an Ethernet interface?(choose two)
A. when the sending device waits 15 seconds before sending the frame again
B. when the cable length limits are exceeded
C. when one side of the connection is configured for half-duplex
D. when Carner Sense Multiple Access/Collision Detection is used
E. when a collision occurs after the 32nd byte of a frame has been transmitted