Hello!
I believe the greatest accomplishment of Ancient Egypt is The Great Pyramid of Giza.
I hope it helps!
Constantinople since it is the heart of the empire.
Montesquieu- He believed that each of the branches should be able to keep each other in Check so there isn’t a shift in governed power therefore creating the checks and balances that we use to this day.
By looking a the options I would say that the answer is A.