The correct option is D All
The period before the discovery of the art of writing is called the Prehistoric age. This is so because we do not find evidence of the linguistic development or the use of script. In this age, man was a nomad and indulged in hunting and food-gathering. The relics of the hunting and food-gathering humans are available in Bimbetka, Hunasagi and Kurnool in India. There are many other sites in which such relics have been found. Most of these sites have been discovered along the banks of rivers and lakes. Bhimbetka is a rick shelter site.