How is the marshall plan an example of cold war tactics

The Marshall Plan allowed the United States to compete for power with the USSR without using force.

Explanation/context:

The "Marshall Plan" was named after the man who then was US Secretary of State, George C. Marshall.  Officially the plan was called the European Recovery Program.  Marshall announced the plan in 1947, and it went into effect in 1948.  The intent was to provide aid and rebuilding to European economies after the damaging effects of World War II.  

In his speech introducing the plan, Secretary Marshall had said:  "Our policy is not directed against any country, but against hunger, poverty, desperation and chaos. Any government that is willing to assist in recovery will find full co-operation on the part of the United States. Its purpose should be the revival of a working economy in the world so as to permit the emergence of political and social conditions in which free institutions can exist."

The view in the communist-controlled Eastern bloc was that the US was trying to use such a policy to spread its influence and threaten their patterns of government under communism.  So the plan ended up building allies for the US in Western Europe, while the Eastern European countries sided with the Soviet Union.  So it was an example of Cold War tactics of competition between the US and the USSR, apart from the use of military force.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: