Answer:
The Progressive Era was a period of widespread social activism and political reform across the ... A third theme was building an Efficiency Movement in every sector that could ... meant waste and inefficiency, and eagerly sought out the "one best system". ... In the early 20th century, American philanthropy matured
Explanation:
The reason that made immigration different in the time between the year 1860 and 1920 that in previous years is that the immigrants are likely or tend to be more from the Southern and as well as the Eastern Europe that made it different compared before.
By not joining the First World War until the very end, and not joining the League Of Nations
Watercolor is a mixture of water with gum arabic,
With the exception of the last sentence, all sentences are fluidly written and clearly connected between each other. In the case of the last example, the lack of transitional phrases between the two sentences creates a disconnection between the concepts expressed. While we might still be able to understand these sentences, we need to make the transition happen for ourselves as it was not included in the example.
Therefore, your best answer is option D.