Please match the Cisco NAC appliance component to its description.
(1)Cisco NAS
(2)Cisco NAA
(3)Rule-set Lpdates
(4)Cisco NAM
(a) a centralized management point
(b) an in-band cr out-of-band device for network access control
(c) a Windows-based client which allows network access based on the tasks running
(d) a status crecker for operating systems,antivirus,antispyware,etc

A.
(a)-(4);(b)-(1);(c)-(2);(d)-(3)

B.
(a)-(3);(b)-(2);(c)-(4);(d)-(1)

C.
(a)-(4);(b)-(3);(c)-(1);(d)-(2)

D.
(a)-(2);(b)-(4);(c)-(3);(d)-(1)