Which two statements are true about juniper-express-engine (express AV)?

Which two statements are true about juniper-express-engine (express AV)? (Choose two.)

A.
It does not support scan mode by extension.

B.
It can detect polymorphic viruses.

C.
It cannot decompress a zipped file transmitted using FTP.

D.
It cannot decompress a zipped file transmitted using POP3.