By the turn-of-the-century what were the three main beliefs that guided american foreign-policy

The three main beliefs that guided American foreign policy by the turn-of-the-century were: 1. Americans believed that the growth of the U.S. economy depended on exports. 2. they felt the United States had a right to intervene abroad to keep foreign markets open. 3. They feared the close of an area to American products, citizens, or ideas threatened U.S. survival.