An Organization Separates Its Client Computers from Its Servers in a DMZ

An organization separates its client computers from its servers in a DMZ. The client computers are allowed access to the Internet by connecting to the DMZ. The DMZ is connected to a NAT router. In this scenario, what is the device that will allow the NAT router to connect to the ISP using a last mile technology?

A) Next Generation Firewall
B) Demarcation point
C) Remote access server
D) Point-to-Point Protocol over Ethernet (PPPoE)