Final answer:
Marriage requires the greatest commitment among the Christian special occasions as it involves a lifelong promise between two individuals, whereas Baptism mainly involves the parents' and godparents' promise, and Confirmation is a personal pledge of faith made in young adulthood.
Step-by-step explanation:
Among the Christian special occasions of Baptism, Confirmation, and Marriage, the one that requires the greatest commitment from the participants is Marriage. Baptism is the Christian rite of purification by water, usually involving infants where the commitment is primarily on the part of the parents and godparents. Confirmation is a pledge to be a faithful member of the Church typically taken in young adulthood, representing a personal reaffirmation of faith. However, Marriage is believed to be sanctified by God and involves a lifelong commitment between two individuals to love and support each other for the rest of their lives, embodying the greatest level of personal commitment among these occasions.