The correct answer to this open question is the following.
A positive aspect of the Truman doctrine was established by the United States, President Harry. S. Truman was that it tried to prevent the spread of Communism in European countries such as Turkey and Greece. By providing assistance to those countries, Truman tried to apply the foreign policy of containment while the Soviet Union tried to spread Communism and control other European Nations in what scholars consider represented the beginning of the Cold War years.
The negative side was that countries that received the help of the United States also had to apply some other policies that made them dependant on the approval of the US government.
On the other hand, the Marshall Plan was designed bu Secretary of State, George C. Marshall, as the economic recovery plan for Western European countries, at the end of World War II. After the war, western European countries suffered to much damage and destruction, and the Marshall Plan aimed to offer some economic relief. The negative side was that European countries that accepted the aid, ended up with a deep debt.