what does this command allow you to upgrade?

You are running a VPN1 NG with Application Intelligence R54 SecurePlatform VPN1 Pro Gateway. The Gateway also serves as a Policy Server. When you run patch add cd from the NGX CD, what does this command allow you to upgrade?

A.
Only VPN1 Pro Security Gateway

B.
Both the operating system (OS) and all Check Point products

C.
All products, except the Policy Server

D.
On~ the patch utility is upgraded using this command

E.
Only the OS