Which of the following describes sectionalism?

Which of these statements best describes the ambiguity in this excerpt

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

The battle of fort wagner is most important for which