which an attacker changes his or her IP address so that he or she appears to be someone else?

Networks are vulnerable to an attack which occurs due to overextension of bandwidth, bottlenecks,
network data interception, etc. Which of the following network attacks refers to a process in which an
attacker changes his or her IP address so that he or she appears to be someone else?

A.
Session sniffing

B.
IP address spoofing