The great pyramids at Giza are remarkable structures because B.engineers have not figured out how they were built without modern technology .
The answer is D "it ended slavery in the US" i have Taken the quiz before and the answer was correct hope this helps :)
Explanation:
It would be the "c. feudal system" that was <span>formalized in England during the medieval period, since this system left the lower class "peasants" with practically no upward social mobility. </span>
Answer
Roaring Economy of the 1920s.
Explanation: