what file contains the ADF authentication Servlet definition and mapping, defines a security constraint on authentication…?

After implementing ADF authentication in an application, what file contains the ADF authentication
Servlet definition and mapping, defines a security constraint on authentication (to which you can
then add further security constraints), and defines the login configuration?

A.
adfc-config.xml

B.
faces-config.xml

C.
jazn.data.xml

D.
web.xml

E.
weblogic.xml

Explanation:
http://download.oracle.com/docs/cd/B31017_01/web.1013/b28967/adding_security003.htm