Article I describes the design of the legislative branch of US Government -- the Congress. Important ideas include the separation of powers between branches of government (checks and balances), the election of Senators and Representatives, the process by which laws are made, and the powers that Congress has.
When the Western Roman Empire collapsed, one other Roman Empire was still in power until 15th century. This was the Eastern Roman Empire and its other name was the Byzantine Empire- the correct answer is A
