Someone plz help me I’m stuck at this question :(

Ineed on 2-4 i want y’all to reply to this question so i can turn this into my teacher tomorrow

The formation of business monopolies in the late 1800s was made possible by the (1) effects of laissez-faire policies (2) passage of federal antitrust laws (3) elimination of the free-enterprise system (4) adoption of socialist economic practices

Which russian tsar transformed thr royal residence in st. petersburg, the hermitage, into a center of culture, painting, and the performing arts