What led to the development of the kingdom of kush? a. egypt bribed tribes to reunite to resist barbarian tribes. b. gold was discovered and the kingdom formed around it. c. egypt was expanding south, so the leaders united to resist egypt. d. egypt conquered lands and formed a colony.

The correct answer is D. Egypt conquered lands and formed a colony.
The Kingdom of Kush came to existence before the Egyptians move south and conquer it's territory, and making the Kingdom of Kush an Egyptian province. But actually the Egyptian colonialism influenced the development of this Kingdom. Because of it's resources, like the gold, and it's excellent strategic location as a trading rout, and the Egyptian military as a protector, this Kingdom became rich, people had good and peaceful lives, and the Kingdom prospered and developed significantly.