By the first century the making of paper in some parts of China had been well developed and had been common.

By the first century the making of paper in some parts of China had been well developed and had been common.

A.在公元一世纪时，中国一些地方的造纸业得到了好的发达进而普遍。

B.中国一些地方的造纸业在公元一世纪时实现了发达和普遍。

C.到公元一世纪时，中国一些地方的造纸业已很发达而且很普遍。

D.直到公元一世纪时，中国一些地方的造纸业得到好的发展和普遍。

正确答案是C