Answer:
The Protestant group that held predestination as one of its main doctrines was the Calvinists.
Step-by-step explanation:
Calvinists, followers of the theological teachings of John Calvin, emphasized the concept of predestination as a central doctrine. According to Calvinist theology, God, in His sovereignty, preordains the eternal destiny of individuals, whether for salvation or condemnation, irrespective of their merits or actions.
This belief in predestination was a distinctive feature of Calvinism and set it apart from other Protestant denominations. Calvinists viewed this doctrine as a fundamental aspect of their understanding of God's plan for salvation and the divine control over human destiny.