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.