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

The American state is secular in its Constitution and allows the citizen to have freedom of religious beliefs and practices in their private environments. However, in a work relationship and education environment, it is not reasonable to practice religious advertising, as in the case of a teacher or physician who in any way tries to influence third parties to their particular religious precepts. Nor is it permissible for an official to place a sign in a public building.

However, the practice of a religious practice in a public space, but that does not importune third, as a prayer of a relative is interpreted as the free exercise.

Therefore, the iten A is true.