Huh... this seems to be an opinion question.
No matter, ill try.
It depends on the figure you look at. Partns would be B. governments? Could be all of them. I see how you got confused. Unles this is an opinion question, you may have to guess.
I think it means that the more you try, the more successful you will get at it. Correct me if i am wrong.
Third answer i think! let me know if its correct