The United StatesI. Choose the correct answer.1. In area, the United States is the c largest country in the world.a. 2ndb. 3rdc. 4thd. 5th 2. The Midwest in the US refers to the region d .a. west of the Mississippi Valleyb. west of the Appalachian Mountainsc. east of the Rocky Mountainsd. around the Great Lakes and the upper Mississippi Valley.3. The Backbone of North America refers to the b .a. Appalachian Mountainsb. Rocky Mountainsc. the Rocky Mountainsd. Sierra Nevada Mountains4. Death Valley is on the western edge of a .a. the Great Basinb. Californiac. the Rocky Mountainsd. the Sierra Nevada Mountains5. Which region might have a dust storm in summer? ca. The Deep South.b. The Middle West.c. The Great Plainsd. The Central Valley of California.6. Which area has the highest rainfall in the US? ba. The region around the Great Lakes.b. The western part of Washington State.c. The Middle Atlantic states.d. The Central Valley of California.7. The US primary suppliers of foreign oil are the following countries except b .a. Canadab. Japanc. Venezuelad. Saudi Arabia8. The US largest open-pit copper-mining center is in b .a. Californiab. Utahc. Montanad. South Dakota9. The over 3 million of early Americans in 1790 were mostly of ancestry. ca. Spanishb. Frenchc. Britishd. Dutch10. How many immigrants were legally received by the US each year during the 1980s? ba. About 270,000.b. About 700,000.c. About 675,000.d. About 800,00011. The official racial segregation continued to be the law of the US until d .a. 1860b. 1863c. 1918d. 195412. American Indians now mainly live in the a .a. Southb. Westc. Midwestd. Northeast13. The majority of American Hispanics are from the following countries except c .a. Me...