Which two operating systems are supported for the View Connection Server?

Which two operating systems are supported for the View Connection Server? (Choose two.)

A.
Windows Server 2003 R2 64-bit Standard or Enterprise

B.
Windows Server 2003 R2 32-bit Standard or Enterprise

C.
Windows Server 2008 R2 32-bit Standard or Enterprise

D.
Windows Server 2008 R2 64-bit Standard or Enterprise