Read the sentence.In the late 1800s, a new wave of immigrants, most of whom were unskilled workers looking for jobs in factories, arrived in US cities, and those cities found themselves unprepared to cope with their burgeoning populations.What kind of sentence is this?

The sentence has two independent clauses joined by “and”: a new wave of immigrants “arrived in US cities,” and “those cities found themselves unprepared.” It also contains the dependent clause “most of whom were unskilled workers,” which describes the immigrants. A sentence with at least two independent clauses and a dependent clause is compound-complex, so the correct choice is C.

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