Answer:
C- a nation state
Explanation:
for example iraq is divided between the Sunni Muslims, the Shiite muslims and the Kurds
A possible cause was a meteorite hit the earth. it caused many organisms to become extinct because it blocked out the Sun so plants couldn't grow and herbivores couldn't eat the plants and carnivores couldn't eat herbivores.
They are all examples of land forms
According to the internet it took centuries
Hope this helps :D