The answer would be D) Coins.
Take off D; the North had won some battles up to that point. Rip off A; the South would never let go of slavery. Take off B, since the Union had some wins already. You can now clearly see where the answer is.
Answer:
While hunter-gatherers ate wild grains that they collected, early farmers saved some of the grains to plant. Humans lived differently once they learned how to grow crops and tame animals that produced food. They now could produce a constant food supply. This allowed the population to grow at a faster rate.
Explanation: