What Was the Significance of the Case of West Virginia

What was the significance of the case of West Virginia State Board of Education v. Barnette (1943) ?

A) The Supreme Court held that states could not require children to pledge allegiance to the United States each school day.
B) The Supreme Court held that the unlicensed soliciting of funds could be used for religious or charitable contributions.
C) The Supreme Court held that a state could not punish someone for blacking out the part of a car's license plate that sets forth the state's motto.
D) The Supreme Court held that personal religious beliefs do not excuse a person from complying with an otherwise valid law.