Under the Articles of Confederation, the a. president was elected to four-year terms.
b. states were prevented from discriminating against each other in the competition for foreign commerce.
c. armed forces of the United States consisted of state militias.
d. Continental Congress had the power to lay taxes on citizens.

it is A:president was elected to four-year terms

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.