This is true, American consumers can buy and sell what they like, when they like.
D is not true... Universal Studios is in Florida, but not in the Keys.
This is because both Puerto Rico and the Virgin Islands were unincorporated territories of the United States with the U.S president as head of State. There was no need to patrol Puerto Rico and the Virgin Islands as the U.S blockade was against Cuba, not against the two U.S territories.
<span>It is biased information to look in candidates' websites. A website is an accumulation of related website pages, including sight and sound substance, normally related to a typical area name, and distributed on no less than one web server. Therefore the answer is C. </span>