At the same time that Luther was developing his church, was hard at work in Switzerland
trying to reform the church there.

Correct answer is John Calvin.

Explanation:

John Calvin created his own teaching there that was based on the idea of predestination. His idea was mainly based on the belief that God is controlling everything and that he has power over everything.

In his beliefs and attitudes towards Catholic church he was more aggressive than Martin Luther.

4 copper and gold, the california gold rush is why im pretty sure.