Problem: Which of the following would MOST LIKELY violate the Establishment Clause? A law that prohibits carrying guns onto school grounds. A law that makes smoking peyote a crime. A city that displays various holiday decorations, including a Christmas tree, a menorah, and a Festivus pole. A public school teacher that leads a class in prayer at the beginning of the day. A school that permits a Christian organization, in addition to other organizations, to meet on school grounds.