Question

**Please help!!
Cities grew along railroads and canals because

the government designed the cities

workers could not live anywhere else

settlers could obtain cheap land nearby

there were not enough roads made of tar

Answer 1

http://en.wikipedia.org/wiki/History_of_rail_transport_in_the_United_States

Answer 2

Well, I guess I'd go with settlers could obtain cheap land nearby, though I don't think any of these answers are really good.

Answer 3

I'd go with the roads answer. I don't know about being made of tar. But railroads and canals were sometimes the only transportation route in the area. Poor roads don't attract many people.
Also, the land near railroads and canals was likely to be more expensive because it was more desirable.