Answer:
The Middle Kingdom (1975-1640 BC)
He defeated the last of the rulers of the Dynasty X, who ruled Lower Egypt, and re-unified all of Egypt. Mentuhotep II wore the Double Crown of Egypt, which represented the unification of Upper and Lower Egypt.
Explanation:
B. Marie Curie....
because it is simply stated fact and not something that could have been exaggerated or made up, like the other 3 answers.
That looks correct to me. My grandfather used to plant a different crop in the field after it was left fallow, because different plants need different nutrients.
