The election of the US president.
Answer:
A. "Our Union! It must be preserved!"
B. "The Union, next to our liberty, most dear."
Explanation:
A. Looking directly at Calhoun, the president declared, "Our Union! It must be preserved!
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B. The vice president rose with a toast of his own: "The Union, next to our liberty, most dear."
The main reason why external criticism is so important when it comes to analyzing data is because as the handler of the data yourself, you can quickly develop a bias and "expect" a certain outcome, which might affect your analysis.
Many people sought employment in factories during the industrial revolution. This changed the way that people worked. Life didn't change much aside from the demand of products.