Bernice created an art project in school that, in part, had an American Flag that was covered in graffiti. She won an award for her artwork, and printed a copy on a t-shirt, which she wore to school. The school officials forced her to remove the shirt, saying that while some speech was allowable, the American Flag was specifically protected under American law. What Supreme Court case could Bernice refer to if she wanted to specifically challenge this claim?

A. Trinity Lutheran Church of Columbia v. Pauley
B. Roe V. Wade
C. Brown v. Board of Education
D. Texas v. Johnson