Which of the three criteria of the Lemon test was violated in the Lemon verses Kurtzman case?

In the Lemon v. Kurtzman case, the criterion that was violated is the "excessive entanglement" standard. The Supreme Court found that the state funding of religious schools under the programs challenged created significant government involvement in religious activities, leading to an inappropriate level of entanglement between church and state. This entanglement risked the government's endorsement of religion, which is contrary to the Establishment Clause of the First Amendment.