The example of plagiarizing the third sentence would be:
C. the worth of the manufacturing industry in the United States increased from $3 to $13 billion from 1869-1910 (Connections Education 2012)
This option rewrites the original sentence without providing sufficient original thought or analysis, effectively presenting it as one's own work, even though it includes a citation. While this citation is included, the amount of paraphrasing done does not make it sufficiently different from the original text, which constitutes plagiarism.