Answer: C. Early civilizations develop in ancient Egypt
Step-by-step explanation:
The best option to complete the diagram is the answer above because it is the only ancient event in the options and looking at the timeline presented, only an ancient event could be the answer.
This is because the Kush Civilization only controlled the Nile River region in ancient times so an event that comes before it must be ancient as well. The other events in the options happened after the birth of Jesus (AD) and so cannot be considered ancient.