Which two statements are true for both express antivirus and full file-based antivirus?

Which two statements are true for both express antivirus and full file-based antivirus? (Choose
two.)

A.
Signature updates of the pattern database are obtained from Symantec.

B.
Intelligent prescreening functionality is identical in both express antivirus and full antivirus.

C.
Both express antivirus and full file-based antivirus use the same scan engines.

D.
The database pattern server is available through both HTTP and HTTPS.