The correct answer is D) Norway and Sweden.
During the Reformation, Lutheranism took a firm hold in Germany (the Holy Roman Empire), especially in the northern and eastern areas. Referring to the map, the other countries where Lutheranism became the main religion were Norway and Sweden.
Martin Luther (1483-1543) was a German monk that started the reformation movement form the Catholic Chuirch. He wrote the famous book "95 Thesis" in which he expressed his concerns about some issues and old practices of the Catholic Church. His ideas became a religion called Lutheranism.
