How did the truman doctrine shape u. s. foreign policy after world war ii?

Harry Truman's successful policy of military aid to Greece and Turkey following World War II was key in his decision to make that the cornerstone of US Cold War foreign policy.  From then on, until the end of the Cold War in 1991, we can see a consistent theme with each President of giving military foreign aid to, and forming defensive alliances with, countries facing communist threats.

This doctrine gets us involved in the Chinese..

i r r e l e v a n t

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.