A. The cave man's first inventions were the hunting club and the handy sharpened stone.
B. With the passage of time, they developed systematized symbols from their drawings, which represented words and sentences that were easier and faster to draw, and could be universally recognized for meaning and content.
C. The latter was used not only as an all purpose killing and skinning tool, but got adopted later as the first writing instrument.
D. Human beings have used some implement or the other to record their feelings stories etc, from time immemorial.
E. They used it to scratch pictures on the walls of their cave dwellings representing scenes from everyday life.
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