In between 1870 and 1910, The GNP (Gross National Product) and the percentage of high school graduates both rose.
Gross National Product (GNP) is the total value of production of all finished goods and services by the country's citizen in a financial year, irrespective of their location. GNP also measures the generation of output by a country's businesses, either domestically or abroad.
It was the time between 1870 to 1910, in which U.S. became the world's largest economy by 1890. In those time, economic output was a function of the population rather than productivity. The Industrial Revolution added productivity to the equation which leads to making of largest economy.
Hence, the answer is both GNP and percentage of high school graduates rose.
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