Members of Congress Have Frequently Proposed a Constitutional Amendment to Make

Members of Congress have frequently proposed a constitutional amendment to make flag burning a crime because

A) state laws that make flag burning a crime are too lenient.
B) state laws that make flag burning a crime are too harsh.
C) the only way to overturn the Supreme Court's ruling that flag burning is protected speech is through a constitutional amendment.
D) the Supreme Court has already ruled that flag burning is a crime.