The correct answer is - a rise in the total amount of goods and services produced within the borders of a nation.
The economic growth is is defined by the economic activity of the nation, how much is it producing, as well as the quality of the production, of both goods and services within its borders.
If a nation starts to produce more goods, and has where to sell those goods, that automatically, the nation is making bigger profit by having and influx of money in its economy. The same goes for the services, if they are increasing and their quality is becoming better (which is a huge factor for the increase), more and more money will flow into this sector, thus giving it a big economic injection for the nation.
