Answer:
c. Congress handed the president a blank check to use further force in Vietnam.
Explanation:
In August 1964, two destroyers of the U.S. army located in the Tonkin Gulf in Vietnam communicated that they were under the attack of North Vietnamese forces. As a response, president Lyndond B. Johnson asked the United State's for permission to reinforce military presence in Indochina. That same month, the Tunkin Gulf Resolution was passed, giving green light to President Johnson to act however it was necessary to keep international peace and security in the south of Asia.
On April 3, 1948, President Truman signed the Economic Recovery Act of 1948. It became known as the Marshall Plan, named for Secretary of State George Marshall, who in 1947 proposed that the United States provide economic assistance to restore the economic infrastructure of postwar Europe.
The economic changes were that people were investing in stocks more and more which eventually led to the great depression during the first half of the 20th century. Socially people started getting more and more rights, especially in the workplace. Women were also getting more respect and were close to getting their voting rights. Politically this was an era of busting trusts and breaking monopolies and big banks as led by the progressivists.
Answer: Separation of power, how this helps!