The Land of Kush Was Founded When

The land of Kush was founded when:

A) the Upper Kingdom of Egypt separated from the Lower.
B) the Hyksos conquest weakened Upper Egypt's control over the Nubians.
C) the Hyksos conquest weakened Upper Egypt's control over the Ethiopians.
D) a civil war erupted among the nobles of Egypt for the right to be pharaoh.
E) unable to conquer Egypt, the Hyksos established their own territory to the south of the Egyptian kingdoms.