What would happen if the european union put a quota on american jeans and only allowed 4,000, pairs of jeans to be imported?
a) nothing, because european countries dislike american products.
b) american jeans would become very expensive and desirable in the eu.
c) american jeans would be less desirable in the eu and there would be no demand.
d) french jeans would be more popular than any jeans and america would stop importing jeans to europe.

B) American jeans would become very expensive and desirable in the EU.

Explanation:

This outcome would result from the supply-demand law. Original American jeans are a higly desirable item in Europe and elsewhere, there is demand. You then limit supply by imposing a quota while demand remains stable; because of these restrictions, jeans will simply become more expensive in the European Union´s markets.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.