Question

Which of these statements accurately explains why the Common Era begins with the birth of Jesus of Nazareth over 2,000 years ago?

Answer 1

B. The period of time now described as the Common Era is based on older Christian periodization that divided time into a period before Jesus's birth and a period afterward.

Step-by-step explanation:

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Answer 2

Catholicism has always been a huge religion, and has been in control of the world for previous ages.  For that reason, they were the ones who could dictate when to start the timeline, and chose the birth of Christ as that starting point.