An attacker uses a network sniffer to capture the packets of a transaction that adds $20 to a gift
card. The attacker then user a function of the sniffer to push those packets back onto the network
again, adding another $20 to the gift card. This can be done many times. Which of the following
describes this type of attack?

A.
Integer overflow attack

B.
Smurf attack

C.
Replay attack

D.
Buffer overflow attack

E.
Cross-site scripting attack