how were the truman doctrine and the marshall plan relevatn to the american foreign policy goal of containment?

Answer 1

They promised aid to democratic nations and defense if these nations were threatened by other nations. In other words these plans kept Communist countries out of democratic countries.

http://www.state.gov/r/pa/ho/time/cwr/82210.htm

http://www.infoplease.com/ce6/history/A0831964.html