You have a listener process， L1， currently listening for the connections to the PROD and ADMIN databases. You create a new database， PAY， using CREATE 
DATABASE.. command. You have not enabled dynamic instance registration. You modified the LISTENER.ORA file manually to include PAY database for L1 listener process. 
Which command of Listener control utility （LSNRCTL） would you use to enable L1 process to start listening for the connections to the PAY database without disrupting any existing database communications？（）