Jotted this down from somewhere a while ago but forgot from where 
Thoughts?
Concerns about congestion led to the construction between 1900 and 1980 of two separate highways to serve Greater London.
A. Concerns about congestion led to the construction between 1900 and 1980 of two separate highways to serve
B. Concerns about congestion have led to the construction of two separate highways between 1900 and 1980 to serve
Thoughts?
Concerns about congestion led to the construction between 1900 and 1980 of two separate highways to serve Greater London.
A. Concerns about congestion led to the construction between 1900 and 1980 of two separate highways to serve
B. Concerns about congestion have led to the construction of two separate highways between 1900 and 1980 to serve

















