I want to know the answer to the following question:
What did John Knox do when he returned to Scotland after studying under Calvin?
All the background I'm provided with is that "King James VI and I moved the Church of Scotland towards an episcopal form of government, and in 1637, James' successor, Charles I and William Laud, the Archbishop of Canterbury, attempted to force the Church of Scotland to use the Book of Common Prayer.". Is that enough to answer the question?
Answer: no