At the dsl local carrier's office, the demultiplexes the data streams and converts them into digital data.

At the DSL (Digital Subscriber Line) local carrier's office, the  DSLAM demultiplexes the data streams and converts them into digital data.

DSLAM stands for Digital Subscriber Line Access Multiplexer. It is a network device, usually at a telephone company central office that aggregates individual subscriber lines  into a high-capacity uplink.

this is false i think

if it is a true or false question

ok so if i am right is would be b) and c)