Explanation:
Become the most populous empire in the world.
I truly want to say A is the answer , B isn't anything I believe because of the gold rush.
Answer:
B. the Tigris River and the Euphrates River
Explanation:
the region's semiarid climate didn't have much rainfall, with less than ten inches annually. This initially made farming difficult. the Tigris and Euphrates provided a source of water that enabled wide-scale farming.
The primary reason why the 2010 Affordable Care Act stands as one of the most important domestic policy plans in recent history is because it was the first of its kind. Universal healthcare had never existed in the United States before.
