The correct option is A The Old Stone Age humans were also known as quartzite humans
The Old Stone Age developed in the Pleistocene Age. The Old Stone Age or the Palaeolithic humans were also known as quartzite humans because they used a hard stone called quartzite to make their tools. There are three categories of stone tools; Core tools, used for pounding and crushing , Flake tools, designed for scraping and slitting and Blade tools , used for slicing and engraving. The Old Stone humans used tools made of wood and bone also. But it is the stone tools which have survived.