The new security feature in Vista that prevents programs from running with escalated privileges is called：（）

A.Use recovery console and the bootcfg /rebuild command.
B.Use recovery console and the chkdsk command.
C.Use recovery console and the fixboot command.
D.Use recovery console and the fixmbr command.

A.A public place where guests are free to access the wireless network.
B.A small office where a defined number of specific wireless devices are used.
C.A meeting room where various company users will access the wireless network during meetings. 
D.An office where some users are unable to use WPA encryption due to older wireless cards so they use MAC filtering.

A.23
B.443
C.8080
D.3389