Why does this article mention both the Egyptian and Roman glass artifacts before it describes the glass factory?

Responses
A in order for the reader to have background information on what makes glass specialin order for the reader to have background information on what makes glass special
B in order to demonstrate why Kerry Morelli is so fascinated by the creation of glassin order to demonstrate why Kerry Morelli is so fascinated by the creation of glass
C in order for the reader to realize that glass does not really have an interesting historyin order for the reader to realize that glass does not really have an interesting history
D in order to demonstrate that the technology to make glass hasn't really changed over time

A in order for the reader to have background information on what makes glass special