Final answer:
Edward VI, the son of Henry VIII, reformed the Church of England with significant Protestant changes, including allowing priests to marry and introducing the Book of Common Prayer, contrasting his father's minimal changes from Catholicism.
Step-by-step explanation:
During the reign of Edward VI, the son of Henry VIII, the Church of England adopted much Protestant doctrine and practice. Unlike his father, who only made minimal changes after separating from Rome, Edward introduced significant reforms that brought the church closer to Protestant beliefs prevalent on the continent. Priests were allowed to marry, and the English-language Book of Common Prayer was published in 1549, setting out the reformed church service. After Edward's death, his half-sister, Mary I, who was strongly Catholic, attempted to reverse his reforms and restore Catholicism, leading to persecution of Protestants. However, this was again changed when Elizabeth I took the throne, seeking to balance Protestant and Catholic interests while leaning towards Protestantism.