Why did the americans move west in the years following the civil war

Which of the following brought about the final settlement of the official boundary lines of the state of texas? the peace treaty of the mexican-american war the 1845 act signed by the president that made texas a state the reincorporation of texas at the end of the civil war the compromise of 1850

What was the main argument of plessy in plessy v. ferguson

(05.04 mc) how did the roman transportation system keep the empire strong? plz