The correct answer is B) to stop the government from supporting one religion.
The purpose of the Establishment Clause was to stop the government from supporting one religion.
The Establishment Clause is part of the First Amendment to the United States Constitution. It is an important clause because it prohibits the US government to makes that promote any specific religion or that favor one religion over the other. So people have the right to practice the religion they want at home or in the proper places, never trying to be disrespectful of the other religions.
The other options of the question were A) to give the citizens the right to form religious groups. C) to give government power to choose a state religion. D) to stop citizens from practicing religion in public.