Final answer:
The Didache highlights the centrality of the Eucharist in the mass, a practice that stems from Jesus Christ at the Last Supper and is a significant ritual for Christians, involving the transubstantiation of bread and wine into the body and blood of Christ.
Step-by-step explanation:
The Didache teaches about the early Christian practices and rituals, including those associated with the mass. Among the options provided, the Didache emphasizes the centrality of the Eucharist within the Christian communal worship.
The teachings of the Didache make it clear that early Christian worship consisted of practices like Baptism, which was seen as essential for the removal of original sin and was often performed immediately after birth. The importance of Communion follows the tradition of Jesus Christ at the Last Supper and was a crucial ritual where the medieval Christians believed that the elements of bread and wine literally became the body and blood of Christ through transubstantiation. This was a key aspect of connecting spiritually with God during the mass.
As for Confession, it was necessary to be forgiven for sins, a condition believed to afflict every human consistently. These teachings reflect the practices of the early Christian communities who gathered for worship and shared communion, thus establishing a strong communal identity.