Select a key benefit of DSL.（）

A. TCP packet sizes can be optimized by the router so there is no IPSec or AAL5 padding.
B. The local loop is a dedicated connection for a single subscriber to the DSLA
C. Access to the WAN media uses a poll/response mechanism so no two subscribers transmit at the same time.
D. There are no distance requirements from the Central Office (CO).&e