Which of the Following Is an Example of a Policy

Which of the following is an example of a policy that seeks to privilege local and national culture?

A) A tariff on Mexican-grown avocados enacted right before the Super Bowl, when avocado sales spoke as many people make guacamole, which lawmakers hope will drive more sales of avocados grow in California and Florida
B) The firing of a Tennessee judge who tried to force parents to change their baby son's name from "Messiah" to "Martin" because the name "Messiah" could only, according to the judge, refer to Jesus, the central figure of the Christian faith
C) The prohibition against bringing soil from another country into the U.S., because that soil might contain aggressive non-native organisms that could hurt American ecosystems
D) The Smithsonian American History Museum selling knick-knacks celebrating material items from American popular culture, such as a coaster with a picture of Dorothy's ruby-red slippers from The Wizard of Oz