Most immigrants from Europe during the early twentieth came from the south and east.
The Columbian Exchange also had positive and negative effects. The positive side was the exchange of technology in agriculture, for example, which increased crop yields and food production in favor of Native Americans and in favor of Europeans. One of the negative effects was certainly the appearance of many diseases that Europeans transferred to the American continent. Native Americans first faced such illnesses, were non-resistant to them, and many of them died.
The correct answer according to the options offered is: A.
Answer:
Lewis and Clark's team mapped uncharted land, rivers, and mountains. They brought back journals filled with details about Native American tribes and scientific notes about plants and animals they'd never seen before. ... Many Americans did more than dream. The great westward expansion was about to begin.
He created new federal agencies to deal with specific needs of the troops and home front
