A) I don't believe the Russians are behind it. Completely fair game.
B) I believe the Russians are behind it. Nevertheless, it is information for the voter to give it any weight the voter deems fit. The more information, the better. Completely fair game.
C) I believe the Russians are behind it. We ought not be using "fruit of the poisonous tree" in the political process, as we then become enablers to the espionage or wrongdoing, perpetrated by foreign or domestic hackers.
D) None of the above.