It would have to be 27 BC when Octavian becomes Emperor.
It's to avoid the full power of a monarchy.
If I'm right feel free to drop a follow~!
The mountain ranges on Southeast Asia's mainland shaped the history of the region because the mountains separated the mainland from the rest of Asia and isolated early societies. The correct option among all the options given in the question is option "A".
The immediate effects are easy. Miles of city would be leveled and all inhabitants of that area would be almost instantly killed. The long-term effects would be there would be so much radiation your body could go through nasty mutation and you'd need to be treated if you survived but if don't survive you'd have a long agonizing death. Also all neighboring cities would have radiation surging through them.
Answer:
Europeans, maybe also Americans.
Explanation:
The Europeans are the most apparent. Britain and Germany were incredibly strong forces in China during and leading up to the Boxer Rebellion. America was also heavily involved. If I had to choose one, I would say Europe, but if not Europe and America were both heavily involved.