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Answer: The answer is B.
Explanation: I don't really have a firm explanation on this topic, but I do remember learning upon this topic.
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Reunification of the Eastern and Western halves of the empire is not considered a factor of decline under Emperors Diocletian and Constantine.
Emperors Diocletian and Constantine.
- A tetrarchy was established under Diocletian's administration, which divided authority between two rulers in the east and two rulers in the west, Galerius and Constantinus.
- For a brief period, the Tetrarchy helped the government regain control of the Roman empire; nevertheless, as soon as there was no longer a single authority, uncertainty set in.
- The tetrarchy was abolished and the Roman empire was once more united under a single ruler when Constantine came to power.
Learn more Diocletian and Constantine rules here:
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