Which parameters are valid SCREEN options for combating operating system probes?

Which parameters are valid SCREEN options for combating operating system probes?

A.
syn-fin, syn-flood, and tcp-no-frag

B.
syn-fin, port-scan, and tcp-no-flag

C.
syn-fin, fin-no-ack, and tcp-no-frag

D.
syn-fin, syn-ack-ack-proxy, and tcp-no-frag