EAPHammer is the correct answer because it is specifically designed for launching targeted attacks against WPA2-Enterprise networks. It can be used to perform man-in-the-middle attacks against wireless clients. The other options, while useful for wireless penetration testing, are not as effective or efficient in the context of attacking WPA2-Enterprise authentication mechanisms. Aircrack-ng suite is more suited for cracking WEP and WPA2-PSK keys, Kismet is primarily a network detector and packet sniffer, and mdk4 is a tool for exploiting vulnerabilities in the 802.11 protocol but does not focus on the WPA2-Enterprise authentication like EAPHammer does.