What Is the Result When Domestic Restrictions, Such as Tariffs

Multiple Choice

What is the result when domestic restrictions, such as tariffs and quotas, are imposed?  

A)  They benefit domestic producers. 
B)  Domestic consumers gain because they can purchase the output of domestic firms. 
C)  They tend to expand the volume of world trade. 
D)  They tend to lower domestic prices because they increase the output levels of domestic firms,.