Regarding the Russian hacking, what is really going on here?

I've read the Washington Post article about the Russian hacking, and I'm still confused. As I see it, there are four possibilities. Which one is it?

1. Since the Post provided no real hard evidence, it's all just a guess and a rumor. No big deal unless more evidence is forthcoming.

2. The Russians really did hack the DNC. But they released only the emails that would hurt Hillary. If so, it's on the DNC for having terrible email security.

3. The Russians really did hack the DNC, and also the RNC. But they released only those (legitimate) emails that would hurt Hillary. If so, that's repulsive, but it doesn't quite rise to the level of demanding a do-over election.

4. The Russians fabricated DNC emails, and/or they hacked into the voting booths to ensure a Trump win. If so, President Obama needs to present evidence to the public, and to the Electors, and to the Supreme Court. And Obama needs to do this immediately! Don't waste a day.

If I had to bet, I'd bet on possibility #3.