Which installation requirement is for Cisco ANM?

Which installation requirement is for Cisco ANM?

A.
Windows NT 4.1
2 GB RAM
50 GB HD

B.
Red Hat Enterprise Linux 4.5
2 GB RAM
60 GB HD

C.
Windows 2003 Server
2 GB RAM
120 GB HD

D.
Ubuntu Linux Server 7.0
4GB RAM
80 GB HD