The establishment clause would prevent

a church from being built in a Jewish area

the mayor's office from displaying a cross

a citizen from placing a religious scene in a business

the president from having a Christmas party at home

The answer is B: the mayor's office from displaying a cross

The correct answer is the mayor's office from displaying a cross.

The establishment cause makes it so that the government cannot establish or endorse a specific religion. This establishment clause ensures that citizens have the right to freedom of religion. This is why the mayor's office would not be able to display a cross, as this would sure an endorsement of a specific religion on government property.