John Calvin and his followers transformed the city of Geneva into an autocracy. a democracy. a plutocracy. a theocracy.

a theocracy.

Explanation:

John Calvin, born as Jehan Chauvin in 1509 was a French Reformer who greatly attributed to the Protestant reform movement during the 16th century. In an attempt to escape from the acquisition of the Catholic Church, he moved to various countries and there he spread his teachings and reforms.

Geneva was one among those places where he had a strong premise. There he and his followers gained religious authority over the city. Calvin more or less turned into a religious dictator of the Protestant movement.

He and his followers followers transformed the city of Geneva into a theocracy where police and church guards could enter into people’s houses to inspect if people were following Calvin’s teachings. Anything related with Catholicism was also completely forbidden in the city.