Answer:
Birth of Astronomy, 85 CE
Explanation:
Birth of Astronomy, chronologically speaking, would be the third event, out of four in total, and it would belong in place C on the timeline.
The wheel used in Mesopotamia is A, Egyptian hieroglyphs is B, and Chinese issue of paper money is D.
This is because events labeled BCE are before events labeled CE. BCE in fact, simply means: "Before Common Era", while CE means "Common Era".