What do you do to preserve site-specific parameter settings and commands for a specific TCPIP service?

A.
Edit SYS$SYSTARTUP:TCPIP$SYSTARTUP.COM.
B.
Edit SYS$SYSTEM:TCPIP$SYSTARTUP.COM.
C.
Create files of the form SYS$SYSTEM:TCPIP$service_SYSTARTUP.COM.
D.
Create files of the form SYS$STARTUP:TCPIP$service_SYSTARTUP.COM.