In Great Britain, civil servants are directed explicitly by the ministers in charge of their departments. In the United States, civil servants often must obey both the heads of their agencies and:

Congress

Explanation:

Civil servants in the US have to obey the agency they are employed under as well as Congress the president has no right to take punitive actions against them based on the constitution. when they have an opinion on issues civil servants have to use what is the chain of command to fight for decisions that are in line with the constitution as well as the law.

its so obvious. its 999 obviously.

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.