Which of king henry's children established the church of england by law? a)elizabeth i b)mary c)edward d)henry ix

In 1534 King Henry VIII declared himself to be supreme head of the Church of England.

However, during the reign of Queen Mary I and King Philip, the church was fully restored under Rome in 1555. However, the pope's authority was again explicitly rejected after the accession of Queen Elizabeth I when the Act of Supremacy 1558 was passed, and England stablished again their autonomy from Rome, but this time, unlike 1534 Act of Supremacy, Elizabeth I developed the understanding that the church was to be "both Catholic and Reformed".

So the final answer is: Elizabeth I