You receive calls from five different users in a 10-minute window of time. Each of then tells you that WLAN is no longer available. You connect to the IP address of the AP across the wired network and can connect with no problem. This reveals that the AP is still running fine. From the list below choose what kind of attack is likely to be occurring? Justify your choices. A. Hijacking B. Encryption cracking C. Denial of service D. Management interface exploit