Which two statements about Junos software packet handling are correct?（）(Choose two.)

• A、The Junos OS applies service ALGs only for the first packet of a flow.
• B、The Junos OS uses fast-path processing only for the first packet of a flow.
• C、The Junos OS performs policy lookup only for the first packet of a flow.
• D、The Junos OS applies SCREEN options for both first and consecutive packets of a flow.