Answer:
To collect taxes from farmers and trades ( C )
Step-by-step explanation:
One of the early inventions of Ancient Egyptians was the use of Mathematics for several purposes like calculating taxes to be paid, counting money, calculating ares of land and even while cooking.
Although Mathematics was used for several purposes in Ancient Egypt even up to the extent of building pyramids with them, it was more effective in working out taxes to be paid by workers and trade persons. these taxes were paid for either through labor or with goods produced by the farmer or goods sold by the trader.