The correct answer is "D".
The period of 1800 saw the rise of the "Enlightenment". A movement that focused on the questioning of the Catholic Church and its practices. It proposed the separation of Church and State. The protestant movement, founded by John Calvin in the 16th century was on the rise and was the predominant belief of the residents of the United States, as the reason many Europeans came to America was their freedom of the practice of Protestantism.