According to cupach and canary, what we actually say to each other may be described as

Distal outcome results of conflict that are not immediately apparent - personal growth, negotiation of family rules.  Distal context Cupach & Canary - past successes/failures backgrounds and personalities of those in conflict. The  model of interpersonal conflict - 5 processes/outcomes - distal context, proximal context, conflict interaction, proximal outcomes, distal outcomes are all Cupach & Canary's Explanatory model.

answer; ///i believe that the correct answer is because the house and senate frequently pass different versions of the same bill;

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.