social studies 8b unit 2 test society and culture which of the following statement best summaries the system of railroads shown on the map
A the majority of the railroads that connected the North to the south were built by 1850
B the railroads established by 1860 each began an ended at a major American city or port
C the extent of the railroads in the South was very limited compared to that of the North
D the primary direction of the railroads built between 1850 and 1860 was North to south