It is definitely D. Congress fought so hard to keep the Union together prior to the Civil War that they instilled a gag order against speaking of the slavery issue in Congress.
Horace Mann was an educational reformer who lived in the US in the 19th century. He was a first to advocate a system of a public schools and public education as he believed that everyone had a right to education and that it should be free, democratic and have a professionally trained educators who would provide a quality education.
Saint Benedict of Nursia founded the Benedictine monastery at Monte Cassino, he is also the father of Western monacticism. He sought to create a sacred school and community and a safe place free from distraction, negativity and vices so, he turned the monastery into a place of work, prayer and space to provide spiritual life and guidance. Inside the monastery people learnt how to live and worship according to his rule. If a person wanted to live as a cenobite monk, he had to renounce to his possessions and distractions and follow God.
He also wrote The rule of Saint Benedict which is a book consisting of precepts for monks living under the authority of an abbot. Benedictines have been using The Rule of Saint Benedict for 15 centuries. As a result Benedict is regarded as the founder of Western monasticism as his rules gave way to reforms on the current Catholic hierarch.
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It your talking about the social studies christianity, im thinking the answer is the pope.
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