Hello CRIS
The answer is
[C] Packet Destination
One of the mechanisms of IP is fragmentation and reassembly. Under certain circumstances, a datagram originally transmitted as a single unit will arrive at its final destination broken into several fragments. The IP layer at the
receiving host must accumulate these fragments until enough have arrived to completely reconstitute the original datagram.
Refers to RFC 815 IP DATAGRAM REASSEMBLY ALGORITHMS
https://tools.ietf.org/html/rfc815