which step in the installation process is it necessary to note the fingerprint for first-time verification?

During which step in the installation process is it necessary to note the fingerprint for first-time verification?

A.
When establishing SIC between the Security Management Server and the Gateway

B.
When configuring the Security Management Server using cpconfig

C.
When configuring the Security Gateway object in SmartDashboard

D.
When configuring the Gateway in the WebUl