All of the Following Are Reasons Why China Is Unlikely

All of the following are reasons why China is unlikely to maintain high enough rates of productivity growth to catch-up with the standard of living in the Canada except

A) Canada invests more in research and development.than does China.
B) much of China's growth is likely due to the transition from a centrally-planned economy to a market economy.
C) because of the low birth rate in China, the labour force will soon decline.
D) the Chinese migration of rural workers to more productive urban jobs.