How does the DB2 Server identify the list of GSS-API plug-ins it supports?

A.
by using the SRVCON_GSSPLUGIN_LIST database manager configuration
parameter

B.
by using the SRVCON_GSSPLUGIN_LIST registry variable

C.
by using the SRVSUPP_GSSPLUGIN_LIST database manager configuration
parameter

D.
by using the SRVSUPP_GSSPLUGIN_LIST registry variable