The answer is A. Them, because it doesn't mean a specific object, it's just them
I'd prefer books, Books also have the advantage of being able to describe everything in greater depth. While television is mostly composed of dialogue between characters, books can walk readers through scenes, characters' thoughts, and provide lengthier commentary.
I think it's gullible, but I could be wrong. Good luck!
I personally would say ancient castle in ruins...
My reason for this would be that the office building and the apartment in the city will be modern and won't have a Gothic feel to it...
The mansion in the countryside will be surrounded by green fields and well that scenario doesn't sound very dark and Gothic to me...
And well that castle in ruins will have a spooky side to it as it will be abandoned and especially at night will be a host to a whole range of spooky thoughts and ideas.
