Which of the Following Statements Is True Concerning Teachers' Freedom

Which of the following statements is true concerning teachers' freedom of religion in schools?

A) A teacher can't be forced to teach something that is in opposition to their religion due to the First Amendment.
B) A teacher must teach only from an "intelligent design" perspective when it is required by the school board or the teacher can be fired for non-fulfillment of duties under contract law.
C) Generally speaking, school boards must reasonably accommodate teachers' observance of religious practices unless it can be proved such accommodation would place undue hardships on the employer and disrupt the learning environment.
D) All are true