The assuming part in E

@Lucas, Generally, an arrow may mean all, some or most, but anything other than all is indicated as such. This question is easier to visualize instead of conditional statements. There is a universe of all countries in the world, only five of them are UNSC permanent members. None of them are small or in the southern hemisphere. Each of these five countries supports UN's greater role in moderating regional disputes. The stance of the rest of the world countries is unknown to us, it might be that all of them support greater UN's role, most, some, or none at all aside from the five UNSC members. Taken as true, the facts in the stimulus thus only allow us to conclude that some countries in favor of a greater role are not in the southern hemisphere, i.e. the five UNSC members. The rest of the answer choices could be true rather than MUST BE TRUE based on the facts in the stimulus. Does this help? Let me know if you have any other questions.

Yes, I get it. I just rewatched the ALL rules when it comes to quantifiers and it explained that. I must have forgot it. Makes sense though