Which of the Following Statements Best Describes the Condition of the Northern

Which of the following statements best describes the condition of the northern American industrial economy by the end of the 1870s?

A) On a global scale, the U.S. manufacturing economy was only exceeded by that of Great Britain.
B) The postwar boom that began in the late 1860s continued throughout the 1870s, enriching the lives of many industrial and commercialized agricultural workers.
C) The number of wage earners in manufacturing remained stagnant.
D) The industrial advances of the 1850s and 1860s had largely been reversed.