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The correct answer is<em> C. The uncovering and careful reading of primary sources.
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This element is fundamental to understanding a point in time because a primary source provides direct evidence about a historic event, person, place or situation. This original information allows other investigations as a point of reference.
Primary sources can be diaries, interviews, fieldwork, pictures, books, ancient texts, government documents., and historic records.
The answer is '4'.
The Soviet economy crumbled further due to the heavy military cost of the invasion.
The U.S. provided financial support to push them out and shorten the conflict. The Red Army did suffer a loss of face but the collapse of the Soviet Union happened because military expenses drained their economy to such an extent that normal, everyday expenses could not be met.
the answer to your question is b
More generally, the Truman Doctrine implied American support for other nations allegedly threatened by Soviet communism. ... Truman told Congress that "it must be the policy of the United States to support free people who are resisting attempted subjugation by armed minorities or by outside pressures.