Which two statements about JUNOS Software packet handling are correct？（）

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