What Allowed the Protestant Reformation to Finally Take Hold in England

What allowed the Protestant Reformation to finally take hold in England in the mid 1500s?

A) King Henry VIII issued the Act of Supremacy, declaring that the entire country should follow the doctrines of the Catholic Church.
B) King Henry's daughter Mary declared the Church of England the official religion of the country.
C) All reformers felt that the religious changes were adequate, thereby creating religious harmony in England.
D) When Elizabeth came to power, she promoted religious moderation.