Concept:The Glorious Revolution was a bloodless transfer of power in 1688. It secured parliamentary supremacy over the monarchy.Explanation:In 1688, leading English Protestants invited William of Orange to invade and claim the throne.William arrived in England and faced no resistance.This event became known as the 'Glorious Revolution' because there was no fighting in England.It guaranteed the power of Parliament and ended the threat of absolute monarchy.Answer:The Glorious Revolution happened in 1688. So the correct option is A. 1688.