Which number on the map labels the area the US acquired in the Gadsden Purchase?
![Which number on the map labels the area the US acquired in the Gadsden Purchase class=](https://us-static.z-dn.net/files/d93/6c79316a0759e3795c0614cb36a094e5.png)
Answer:
D. 3
Explanation:
3 is the area that was purchased during the Gadsen Purchase, which brought the US mainland to it's current borders.
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