Pls help i need this last question

What is the difference between rising and sinking ground?

When land is sinking (or subsiding), it brings an apparent increase in sea levels, while land that is rising (or uplifting) leads to an apparent decrease. The general term for subsidence and uplift is “subsidence.” In some locations, subsidence occurs through natural processes.

why do you think kush in nubia is not as well-known as egypt?

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !