Final answer:
Martin Luther's Ninety-Five Theses criticized the sale of indulgences and corruption within the Catholic Church, initiating the Protestant Reformation.
Explanation:
Martin Luther's Ninety-Five Theses focused on challenging the Catholic Church's practices, particularly the sale of indulgences for forgiveness, which Luther believed had no biblical basis. He accused the church of corruption and criticized its hierarchy and practices, aiming to initiate reform within the church. Luther's actions sparked the Protestant Reformation and led to the rise of Protestantism across Europe.
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