What led to the growth of the middle class during the renaissance

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.

The author of the article, arthur brooks, has been president of the american enterprise institute since 2009, an organization committed to protecting free enterprise in the united states.he is the author of several books, including "the road to freedom: how to win the fight for free enterprise."