Final answer:
The Bible is historically the primary way to spread the mission of the Church, with reformers like Luther focusing on scripture alone, and the printing press aiding in its wider distribution for personal study and evangelism.
Step-by-step explanation:
The primary and best way to spread the mission of the Church has historically been through the dissemination of its sacred texts, among which the Bible is the most significant in Christianity. Over time, reformers like Martin Luther emphasized Scripture Alone as the only reliable source of religious truth, reinforcing the significance of the Bible in understanding and spreading Christian doctrine. Moreover, the printing press's invention facilitated the broader distribution of the Bible, making it more accessible to the laity and allowing for personal study and evangelization efforts. While other elements such as man, rituals, and prayers play essential roles in living out the faith, they are not primarily about spreading the mission of the Church in the way that the Bible does when it is shared and taught to others.