Why is Application Layer particularly vulnerable to attacks? Choose three

A.
Malicious Java, ActiveX, and VB Scripts can exploit host system simply by browsing.

B.
The application Layer performs access-control and legitimate-use checks.

C.
Defending against attacks at the Application Layer is more difficult, than at lower layers of the
OSI model.

D.
The Application Layer does not perform unauthorized operations.

E.
The application Layer supports many protocols.