Final answer:
Option B is correct; it would not be constitutional to restrict Maggie and Sally's form of expression as it is protected by the First Amendment unless it poses a material and substantial disruption.
Step-by-step explanation:
The question asks whether it would be constitutional for school administration to restrict Maggie and Sally from wearing pants with American flag patches on the pockets, an act which results in sitting on the flag. Drawing on prior Supreme Court rulings on symbolic speech, particularly in relation to the First Amendment, the school can only restrict speech if it can prove the speech would "materially and substantially interfere" with school operations (Tinker v. Des Moines). Thus, the answer is most aligned with Option B: No, it would not be constitutional as it is a form of expression protected by the First Amendment. This is because, as established in various cases, including Texas v. Johnson, symbolic speech such as flag burning is protected under the First Amendment unless it poses a real disruption or threat to the school environment.