Group A describes results of the California gold rush
The use of labor-saving devices in industry and agriculture. So b is the correct answer
Answer:
In the late nineteenth century, the United States abandoned its century-long commitment to isolationism and became an imperial power. ... Both a desire for new markets for its industrial products and a belief in the racial and cultural superiority of Americans motivated the United States' imperial mission.
Assuming you're referring to the Great Compromise in the United States, it was very important because it satisfied both the large and small states (in terms of population) regarding how they would be represented in Congress.
