【单选题】London's First Light Rail System The Docklands Light Railway (DLR) took just three years to build at a cost of£77 million. It is London's first Light Rail System, but its route follows that of a numbe...
A.
was constructed in the nineteenth century.
B.
will be finished in three years' time.
C.
follows some of the original lines.
D.
took three years longer than expected to complete.