Answer: Well, according the the all-knowing Googs:
"Immigration to the U.S. in the Late 1800s. Between 1870 and 1900, the largest number of immigrants continued to come from northern and western Europe including Great Britain, Ireland, and Scandinavia. But "new" immigrants from southern and eastern Europe were becoming one of the most important forces in American life."
However!! Uh, There is no 'however', but I hope this lazily-obtained answer helps you, and if it does not, then comment and I will scour the internet for the answer in which. you. seek.
The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.
In the late 1940's, Joseph McCarthy focused an investigation into communism's influence on entertainment and broadcasting. The correct answer is A.