An attacker is sending spoofed router eccouncil video

Full Certification Question

An attacker is sending spoofed router advertisement messages so that all the data packets travel through his system. Then the attacker is trying to sniff the traffic to collect valuable information from the data packets to launch further attacks such as man-in-the-middle, denial-of-service, and passive sniffing attacks on the target network. Which of the following technique is the attacker using in the above scenario?