Some of the major issues that led to the Civil War in the United States included A) conflict arose between the northern and southern parts of the United States, B) the North was more advanced commercially and they were expanding industrially, D) the South wanted new territories that were being admitted into the United States to be slave states. However, C) is not true because the South did not seek to abolish slavery but instead continue the institution of slavery.
Pharos is a pretty good choice
This is important, because this lead to more trade routs with other countries, and this strengthen the empire as a whole. These roads also lead to more connections to cities, and lead to more homes, and overall improved their society as a whole.