Although mark realizes that his behavior is unreasonable, he is so alarmed by high bridges or expressway overpasses that he avoids them by taking an unnecessarily lengthy route to and from work each day. mark appears to suffer from

Hmm.. Mark suffers from a phobia.

Explanation:

A phobia is an extreme or irrational fear of or aversion to something, so he has a phobia of high bridges and expressway overpasses. Mark may have Gephyrophobia (fear of bridges) but only high ones.

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.