In psychology, if a child gets upset and cries after receiving an injection at the doctor's offfoce and now cries when he is told they need to visit the doctor, the mention of the doctor's office is what kind of stimulus

I believe it is a conditional response due to him having his reaction to the injection being the most prevalent thing in his mind about the doctors.

nasa 3

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.