How can the constitution can be amended? What rules must be followed ( there are 2 ).

"To propose amendments, two-thirds of both houses of Congress can vote to propose an amendment, or two-thirds of the state legislatures can ask Congress to call a national convention to propose amendments."

Explanation:

to shorten it.

To propose amendments and ask Congress to call a national convention to propose amendments.

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.