I do believe the early Egyptians, being as smart as they where used a interesting method of a sundial. It caught the suns shadow and they where able to use it to tell the time.
Those tools that had been preserved, of course, are the stone tools. Paleoindian stone tools were generally made from workable stones like chert, quartzite, or obsidian, and Paleoindians seem to have been very picky about only using the best materials for their tools.
I got this from here ⇒ Paleo Indians: Culture, Artifacts & Tools | Study.com
Hope this helps you! =^-^=
<h3>The answer would be; B!</h3><h3 /><h3>

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I believe the answer is A