单选题Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）A Secure access to company extranetB Dedicated lines for high security data transferC Simple solution for high-quality digital video using coaxial cable
题目
单选题
Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）
A
Secure access to company extranet
B
Dedicated lines for high security data transfer
C
Simple solution for high-quality digital video using coaxial cable
D
Data and audio signals that share the same communications infrastructure