What is the purpose of the first three articles of the constitution?

Which of the following american companies had a monopoly in the late 1800s?

What bodies of water provided the eastern border of the zhou dynasty? ?

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