<span>The answer is C-The soil became too salty for crops to grow.</span>
Answer:
migration; diffusion
Explanation:
With the migration of people from fertile areas, knowledge of agriculture spread by diffusion.
Answer:
nine
Explanation:
Instead, on September 28, Congress directed the state legislatures to call ratification conventions in each state. Article VII stipulated that nine states had to ratify the Constitution for it to go into effect.
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