 Complete the following phrase:  Sergio Méndez Arceo was an advocate of the Vatican II principles, which moved for changes in ritual distribution of the sacraments, deemphasis on saints, more studying of the bible, and sociological studies to aid ecclesiastical organization. Méndez Arceo attempted unsuccessfully to have the Mexican Conference of Bishops explore the violent suppression of the student movements in 1968, known as Mexico 68. As an individual without the support of the other bishops, Méndez Arceo assisted the imprisoned students, often called political prisoners, following the 