Witch of these best explains why Cairo, Egypt was a major population center prior to 1500?
A. Cairo is located in the carpathian mountains
B. Cairo is located only 100 miles from Barcelona, Spain
C. Cairo is in the middle of the Sahara Desert
D. Cairo is located at the delta of the nile river in Egypt

pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.

the correct answer is a

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.