match the following: A. This field does not exist in the Ethernet frame B. Used to detect and possibly correct bit- level errors in the frame. C. Used to demultiplex the payload up to a higher level protocol at the receiver. D. The contents of this field is typically (bit not always) a network-layer IP datagram. E. 48-bit MAC address of the sending node. - Cyclic redundancy check (CRC) field - Source address field - Data (payload) field - Type field. - Sequence number field