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Answer:
"Old" immigrants often settled on farms, but most "new" ones lived in cities.
Explanation:
"Old" immigrants often settled on farms, <u>but most "new" ones lived in cities</u>.
first half
<u>second half</u>
these parts of the sentence can "stand alone," therefore making this a compound sentence
I believe the answer is: C) a book containing the letters of a US senator during the war.
Such letters would be considered as a primary source, which is an artifact, documents, or recordings that is made directly during the time of the event. Other sources beside primary source tend to be mixed up with opinions or even modification form other people unrelated to the events, which make them tend to not represent the truth.