Answer: the answer is BC and AD, Egyptian Emperors, and Blank uniform
Explanation: i thought it would be easier just to read this than reading a big explanation.
BC AND AD are the two most commonly used notations to denote the dates of historical events. However, most ancient civilizations did not use this method of marking dates. The Christian calendar was introduced in Rome only when the ROMAN EMPERORS converted to Christianity. This system of dating is still used internationally. Using an UNIFORM dating system makes it easier to mark and compare historical events. are the two most commonly used notations to denote the dates of historical events. However, most ancient civilizations did not use this method of marking dates. The Christian calendar was introduced in Rome only when the converted to Christianity. This system of dating is still used internationally. Using a dating system makes it easier to mark and compare historical events.
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