Which two statements about the use of SCREEN options are correct? (Choose two.)

A.
SCREEN options are deployed at the ingress and egress sides of a packet flow.

B.
Although SCREEN options are very useful, their use can result in more session creation.

C.
SCREEN options offer protection against various attacks at the ingress zone of a packet flow.

D.
SCREEN options examine traffic prior to policy processing, thereby resulting in fewer resources used for malicious packet processing.