Answer:
A.Yes
Step-by-step explanation:
A violation of the first amendment has taken place. The first amendemnt prohibits the government from exercising religion, because that act itself would infringe the rights of the people who hold a different religion.
The first amendment separates religion and state, and as result, forbids the establishment of an official religion in the state apparatus. If the Postmaster General uses public funds to put christian symbols accross the country, the right to freedom of religion of the people who live in predominantly non-christian areas are infringed.