Which ADSL implementation type involves configuring the ATU-R with PPP authentication information (login and password), which provides per session Authentication, Authorization, and Accounting without requiring PPP client on each PC on the subscriber side?

Which ADSL implementation type involves configuring the ATU-R with PPP authentication information (login and password), which provides per session Authentication, Authorization, and Accounting without requiring PPP client on each PC on the subscriber side?
A. PPPoA
B. PPPoE
C. RFC 1483 Bridge
D. RFC 1483 Routing