Use Socratic it will find it
Answer:
President Polk ordered General Taylor to set up for forts along the Rio Grande because the border was in dispute and Mexico wouldn't sell it.
Explanation:
Well, this is very easy, first up; what's a fugitive?
A fugitive is a person that has escaped a place/or is in hiding;to avoid arrest/persecution.
So traveling by wagons,railroads,and walking makes sense. Except for one, slave ships, that makes no sense at all. Why would fugitive slaves travel on "slave ships?"
They relied on Works for their salvation