Which is most commonly true of characters in Realist novels?

They come to an unhappy end.

They go on a great adventure.

They are not described in great detail.

They are normal, common people.

Well, from the realistic novels I've read - if they're real, their called memiors, by the way - then most of the books end with the character coming to a nice end after a lot of struggles, or, they don't have much good to look forward to in life.

As an example, look at "Chinese Cinderella by Adeline Yen Mah"

So ... I would say (a) or (b)