Help me please i have gotten 2 wrong so far and i need help please help

In the 1800s, most european powers followed policies of in which they imposed political and economic control of peoples around the world. a. imperialism b. expansionism c. mercantilism d. isolationism

Immigrants arriving in the united states during the late 1800s experienced many difficulties. which of the following was a problem which large numbers of immigrants faced?

According to subpart d, research with children may be eligible for exemption when: the children will be asked to complete a surveythe research involves the use of educational teststhe children will be interviewed by the researcher.the research with children will involve participant observation with researcher interaction.