Option c accurately describes the order of the development of our calendar
Explanation:
Egyptian calendar is the <em>oldest </em>as the date of origin is unknown but few historical researchers suggest that it originated 4231 BC. It was back in Prehistoric period where writing did not come into existence. .
Julian calendar which originated during the time of <em>Julius Ceasar</em> in 46 BC replacing the Roman calendar.
Gregorian calendar originated in the 15 Century. It is used in many parts of the world. Around 240 years ago the Gregorian calendar was adopted during <em>British Imperialism.
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