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Ancient Egypt had three main social classes--upper, middle, and lower. The upper class consisted of the royal family, rich landowners, government officials, important priests and army officers, and doctors. The middle class was made up chiefly of merchants, manufacturers, and artisans.
Explanation:
Answer:
Have you tried looking up the answers online?
Halting nuclear development would have been extremely difficult, because a lot of the world was trying to catch on to the metaphoric nuclear weapons train.
Hey !
I'm pretty sure the answer is *TRUE*
I hope I was able to help you out! :)
I'm guessing "overcoming difficult barriers"