The Swiss city-state of Geneva became a model of Protestant morality under the leadership of which of the following leaders?

A

John Calvin

B

Ulrich Zwingli

C

Martin Luther

D

All of these

John Calvin was a French by birth who fled to Switzerland to protest against the papal order. He wrote a book called 'Institutes of Christian Religion.' He founded the Puritan sect. He shared a lot of similarities with Martin Luther.