A Matter of Chance is a short story by Vladimir Nabokov written in Russian under his pen name Vladimir Sirin in Berlin in 1924. It was rejected by the newspaper "Rul" and first published by the emigre magazine "Segodnya" in Riga. In 1974 it became part of a collection of thirteen stories called "Tyrants Destroyed and Other Stories" published by McGraw-Hill.

Can we draw the following conclusion?
the piece of writing was done by an unknown author

OPT:
a). Yes.
b). It's impossible to say.
c). No.
c).