If the aliens are strong enough to land their spaceship on earth, investigating all countries is probably a piece of cake for them. There is no reason for them to tie themselves to a certain country or area. In another case, if they establish communication with a certain country/organization, but they cannot arrive, and somehow can only communicate with that certain country/organization, then it could be a different…
These thought experiments are always a little strange to me. If an alien race has the technology for interstellar travel I don’t think it’s too much of a stretch to assume they’d also be able to do whatever they want to observe us (i.e. stay hidden if they like). I think a much more interesting thought experiment is this: if an alien race chooses to make First Contact with us, what’s the likelihood we’re actually the…
I think we should really stop thinking that space travel is the natural continuation of the geographic explorations and colonizations of our past. It has nothing to do with it- new planets cannot be colonized because they're uninhabitable (Earth included for an alien) and distances are too big to transfer significant amounts of population.