What is recommended for a production installation of IBM Tivoli Netcool/lmpact V6.1?

A.
There should be as many GUI Servers installed as Impact Servers.

B.
Each Impact Server should have a GUI Server installed on the same server.

C.
The GUI Server and the Impact Server should be installed on the same server.

D.
The GUI Server and the Impact Server should be installed on separate servers.

Explanation: