A company needs to implement stronger authentication, by adding an authentication factor to their wireless system, which currently only supports WPA with pre-shared keys. The backend authentication system supports EAP and TTLS. Which of the following should the network administrator implement?
A. PKI with user authentication
B. 802.1x using EAP with MSCHAPv2
C. WPA2 with a complex shared key
D. MAC address filtering with IP filtering.