Answer: A. Mary was a Catholic, and Elizabeth was a Protestant.
Step-by-step explanation:
One key difference between Mary and Elizabeth was their religious affiliations. Mary was a devout Catholic and aimed to restore Catholicism as the dominant religion in England during her reign. In contrast, Elizabeth was a Protestant and played a significant role in establishing Protestantism as the official religion of England. Their differing religious beliefs had a significant impact on their policies and the religious landscape of England during their respective reigns.