What are three factors that helped spread Martin Luthers reforms across Europe?

Three key factors that helped spread Martin Luther's reforms across Europe include the invention of the printing press, which allowed for the rapid dissemination of his writings and ideas; the support from influential figures and political leaders who saw the reforms as a way to challenge the Catholic Church's authority; and the rise of nationalist sentiments, which made Luther's calls for reform resonate with those seeking greater autonomy from Rome. Together, these elements facilitated the widespread acceptance and implementation of Lutheran ideas.