Overgrazingnor cattle and deforestation led to their being no roots to hold the soil down. the wind blew off the top healthy soil and left nothing but dust
Answer:
National Security Council Report 68 (NSC-68) U.S. Objectives and Programs for National Security
September 25, 2013
The following report was produced by the National Security Council Study Group headed by Paul Nitze in 1950. NSC-68 is considered to be one of the most significant documents in the history of the U.S. national security apparatus, defining goals, values, and functions of U.S. national security policy throughout the Cold War and beyond. Historian Michael J. Hogan, scholar of U.S. foreign policy and former fellow at the Harry S. Truman Presidential Library, has described the document as the “bible of American national security policy.” This version of the document was obtained from the Woodrow Wilson International Center for Scholars. A plain text version of the document is also available via the Federation of American Scientists.
Explanation:
I think that the answer would be C because it is not A at all and B can be canceled out and so can D dose that help.
The correct answer is B. In 1840, to move lumber from Cumberland, Maryland, to Washington, DC, i would transported it by barge along the Chesapeake and Ohio Canal.
The Chesapeake-Ohio Canal was a canal of the Potomac River, active between 1831 and 1924, linking the cities of Washington D.C. and Cumberland (Maryland). It was used mainly to transport coal from the nearby Allegheny Mountains.
After WWI and during the Great Depression the US tried to be an Isolationist nation. They put out tariffs so people would buy US (forgetting that the rest of the world was still devastated by WWI (economies included)).
