How Did a Western Presence in China Accelerate the Development

How did a Western presence in China accelerate the development of the Chinese economy?

A) It introduced new products that the Chinese were then able to develop for export.
B) It imported a number of goods that helped the lagging Chinese economy to pick up steam again.
C) It introduced the philosophy of capitalism, which helped China reform its markets.
D) It steadily integrated the Chinese market into the nineteenth-century global economy.
E) It introduced industrialized agriculture that helped solve the problem of increased population.