The First Amendment's Free Exercise Clause Bans Government Laws That

The First Amendment's free exercise clause bans government laws that prohibit the free exercise of religion. An excellent example of applying this standard is the one faced by Jehovah's Witnesses in 1943. What was that challenge?

A) The Supreme Court ruled that Jehovah's Witnesses could not go door-to-door to advocate for their beliefs.
B) The Supreme Court ruled that Jehovah's Witnesses were out of the mainstream of religious belief and were therefore not protected by the First Amendment.
C) The Supreme Court ruled that Jehovah's Witnesses are not observing a "legitimate" religion.
D) In West Virginia v. Barnette the Supreme Court ruled that the public school system could not suspend students who as Jehovah's Witnesses refused to salute the flag in their classrooms.
E) In Brown v. Board of Education the Supreme Court upheld a law which banned prayer in school by students who were Jehovah's Witnesses.