Why many european countries develop in a year 1850's? ?

The second amendment is considered controversial because some people disagree about whether

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.

What was the aim of impressionist painters? a to portray the lives of the rich, b to express a moment in the lives of ordinary people, c to create formal portraits, d to use classic painting techniques