The Story of China and the United States Illustrates Which

The story of China and the United States illustrates which of the following concepts?

A) Catch-up Growth for China depended on its own development of new technology.
B) China grew rapidly by creating the technology that later transferred to the United States.
C) The United States' growth rate is lower than China's because the United States is engaged in heavy capital accumulation.
D) U.S. creation of new technology did not allow for as much short-run economic growth as did China's accumulation of existing technology.