Which command would start IPVS connection synchronization for the primary load balancer?

Which command would start IPVS connection synchronization for the primary load balancer?

A.
ipvsadm startdaemon=eth0,master

B.
ipvsadm startdaemon=primary mcastinterface=eth0

C.
ipvsadm startdaemon=master mcastinterface=eth0

D.
ipvsadm startdaemon=eth0,primary

E.
ipvsadm startdaemon=1 mcastinterface=eth0