Question 28 (3 points) The main reason that workers are more productive today than ever before is ob higher levels of pay fewer hours worked less reliancehan skilled work increases in technology Od Question 29 (3 points) ina nyents is likely to increase a nation's labor productivity and sta

Unconditioned stimulus

Explanation:

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.