Answer:
D-building comes and inventing concrete
Explanation:
The Roman Concrete was used from the late Roman Republic to the end of the Roman Empire. It was used to build monuments, buildings, roads, and bridges. The formula of the Roman Concrete was a mix of lime or gypsum, brick or rock pieces, and water. This concrete has been known to be more resistant than modern concrete.
<span>After the Battle of the Marne—during which Allied troops halted the steady German push through Belgium and France that had proceeded over the first month of World War I—a conflict both sides had expected to be short and decisive turns longer and bloodier, as Allied and German forces begin digging the first trenches on the Western Front on September 15, 1914.</span>
Answer:
Make room for American expansion
University of al-Qarawiyyin in Morocco
