Which Statement Best Describes the Construction of Western Railroads

Which statement best describes the construction of western railroads?

A) Western communities pooled their resources and paid to have track laid near their towns.
B) The federal government subsidized construction.
C) As part of the price for returning to the Union, southern states demanded a railroad link with markets in the West.
D) All that was necessary for getting railroads built was to have the government get out of the way by eliminating senseless regulations.