Answer:
Luther came to reject several teachings and practices of the Roman Catholic Church. He strongly disputed the claim that freedom from God's punishment for sin could be purchased with money, proposing an academic discussion of the practice and efficacy of indulgences in his Ninety-five Theses of 1517.Step-by-step explanation: Basically Martin Luther believed "Works are necessary for salvation but they do not cause salvation; for faith alone gives life."
if you need extra help here is this link. wikipedia .org /wiki/Sola_fide