Answer:
It explains when the article was last updated.
Explanation:
Before the date you mention there's another date in the text, it means that this explains when the article was last updated.
The first reason was industrialization. They wanted to "fix" the issue that was unskilled labor (workers without training or experience). This way they could meet the needs of the factories. The second reason I think was because more workers were needed. The more workers that factories and blue-collar jobs had the more progress they would make.<span />
<span>B. Uniformity is your answer
Because they are "the same type", they are Uniform, or "the same"
hope this helps</span>
3. Immigrants come from a variety of different countries
