566 - Logical Reasoning

Lou observes that if flight 409 is canceled, then the manager could not possibly arrive in time for the meeting. But the flight was not canceled. Therefore, Lou concludes, the manager will certainly be on time. Evelyn replies that even if Lou's premises are true, his argument is fallacious. And therefore, she adds, the manager will not arrive on time after all.
Which of the following is the strongest thing that we can properly say about this discussion?

1. Evelyn is mistaken in thinking Lou's argument to be fallacious, and so her own conclusion is unwarranted.
2. Evelyn is right about Lou's argument, but nevertheless her own conclusion is unwarranted.
3. Since Evelyn is right about Lou's argument, her own conclusion is well supported.
4. Since Evelyn is mistaken about Lou's argument, her own conclusion must be false.
5. Evelyn is right about Lou's argument, but nevertheless her own conclusion is false.