What was the “german triangle”?
A. an area in which the streets were rumored to be paved with gold
B. a German speaking ethnic neighborhood of New York City
C. the área between Milwaukee, St. Louis, and Cincinnati
D. an area of the midwest that rejected german immigrants

b

Explanation:

More than five million Germans came to the United States in the 1800s, the largest foreign language group at the time. The majority moved to the Midwestern "German triangle," between Missouri, Ohio, and Wisconsin. Many were farmers in their homeland and pursued the same livelihood in the Midwest.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.