You say “these kinds of terrorist activities”. It's a very broad question.
I think MEK members were involved in some kind of activity against the Iranian government at some point. There's no doubt about that, but I can't speak to what kind. I know the standard under U.S. law is whether they have done anything within the last two years and whether they have the ability and inclination to act now or in the future. As to both of those questions, I'm quite confident the answer is no.