History. (You need to know the line of symmetry in history to find latitude and longitude.)
Answer:
Harry is destined to destroy Voldemort. Harry, Ron, and Hermione go looking for horcruxes. Tonks, Lupin, and Fred die. Voldemort duals Harry and Harry wins.
Explanation:
I read the book.
The preposition is 'at', so "at a beach cottage" is the prepositional phrase. A.
:D