Answer: Option A
Explanation:
Stone tool have been found to be made entirely of stone. Many of the societies exist today which entirely depends on the stone today as well.
Many of the stone tools are found in between 2011 to 2014 at lake Turkana situated in Kenya.
These tools are found be 3.3 million years old which is suspected to have been made by Australopithecus afarensis.
Hence, the correct answer is option A
