Which is not true about the upper paleolithic period?

a.
people made tools by chipping flint pebbles into blades and scrapers that had sharp edges.
b.
humans and animal forms begin to be seen in art.
c.
the period took place between 40,000 and 4,000 bce.
d.
in cave art, artists used the cave’s irregularities to create images.

The Upper Paleolithic period started about 40,000 years BC and ended about 10,000 years BC. So it took place between 40,000 and 10,000 BC. After that started the Mesolithic Era ( 10,000 to 4,000 BC ). Stone tools in the Upper Paleolithic period were primarly blade-based technology. Also this period is well known for the cave art and paintings of animals. C ) The period took place between 40,000 and 4,000 BC ( not true ).