In posner's attention experiments, when a cue indicated "right" and the target appeared to the right, that would be called a(n) trial.

Valid

Explanation: There are two types of trials in Posner's attention experiments: valid and invalid. The first one is when a cue indicates exactly where the target would be appearing, meanwhile the invalid trial is when the cue indicate an erratic position of the target to be presented.

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

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.