Question

Which scenario is allowed under the free-exercise clause?

A parent leads a prayer in a public park.
A teacher gives out crosses at school.
A doctor charges religious patients less money.
A worker places a menorah in the lobby at city hall

Answer 1

A parent leads a prayer in a public park.

Private individuals may express and practice religion in public forums (like parks) under the Free Exercise Clause. The other examples involve government actors or government property (teacher at a public school, display in city hall) or potential unlawful discrimination, which raise Establishment Clause or other legal issues.