Consider the following diagram:

Which of the following best describes the protocol activity shown in the diagram, along with the most likely potential threat that accompanies this protocol?

A.
The ICMP Time Exceeded message, with the threat of a denial-of-service attack

B.
The SIP three-way handshake, with the threat of a buffer overflow

C.
The TCP three-way handshake, with the threat of a man-in-the-middle attack

D.
The DNS name query, with the threat of cache poisoning