I believe the answer is E.) I, II, and III.
There are still five fish since fish can't drown.
To entertain. The books are literally a fantasy series. I suppose it also helped her through her depression and such, but her actual purpose was to entertain and teach some morals suck as the importance of friendship.
Mary I - Anne Boleyn
Elizabeth I - Catherine Of Aragon
Edward VI -Jane Seymour