Which best explains why packets in a network may be received by a host in a different order than how it was transmitted by sender

A. IPv4 allows packets to be transmitted but IPv6 does not

B a packet may arrive with errors and may need to be retransmitted

C. Packets are often sent out all the interfaces of a router when there is no network congestion. For ex if a router has 4 interfaces, a packet sent to this router will be sent out all 4 interfaces when there is congestion in the network.

D. The IP protocol often creates packets with different header formats with different size byte fields. The packets with large headers take longer to get transmitted