In which country did John Calvin start promoting Reformation ideas?

Calvinism spread into England, Scotland, France, the Netherlands, the English-speaking colonies of North America, and parts of Germany and central Europe. This expansion began during Calvin’s lifetime and was encouraged by him.

well the fact it is basically a peninsula allowed trade to come from many places, thus allowing cultural diffusion to take place. india has seasonal monsoons that merchants travel back and forth from india using the monsoons wind patterns

c or d both can be the answer