look at the first few words of all the other sentences, "The reason for this is", "To see this", those are all phrases that introduce a premise.
this question is just made to throw people off because the conclusion is the first sentence when most people dont expect it to be there. also, the "thus" is a way to catch lazy people who think that just because it is a trigger word for introducing a conclusion that it is the main conclusion when in fact it is only a subsidiary one.