People in Germany live according to the principle of religious tolerance. What does that mean?

EDITORIAL LEARNING AID

Why is this answer correct?

Religious tolerance means that every person may freely choose, change and practise their faith; the right not to believe is protected as well (Article 4 of the Basic Law). Answer c is therefore correct. A ban on mosques (a), a belief in God binding on everyone (b) and a state decision on faith (d) contradict freedom of religion.

Freedom of religion: everyone may believe what they want (Art. 4).

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.