The correct answer is A. Queen Mary was a true Roman Catholic who wanted her kingdom to re establish the Roman Catholic religion after her father had broken with the Catholic Church in Rome. As a result, she decided that to make England catholic, she had to vanish any trace of the Protestant reform. For that reason, she hunted down and slaughtered many Protestants across England. In fact, that is the reason why she was called 'Bloody Mary'.
The other options are either not historically correct, or they do not refer to a monarch
