Can someone please help me with these questions

Population growth during the gilded age was due in large part to unemployment among workers. an improved food supply. better health care. immigration to the united states.

Which statement best describes a major advantage of a confederal system of government over a unitary system

What eventually brought an end to the brook farm experiment? a.) george ripley ran out of money to fund it. b.) many former inhabitants spoke badly about it in the press. c.) a fire destroyed the central building of brook farm. d.) the experiment never recovered after a mass exodus of inhabitants in 1848.