Read the following context and choose the best option to answer the question.
Context: If it was able to regain control , the trade surplus would automatically decline anyway because what was pumping exports was the surge in industrial production caused by the channeling of China 's money growth into the banking system - fueled at first , in a self - reinforcing feedback loop , largely by the impact of the trade surplus on reserve accumulation . At first the main source of money inflow was the trade surplus . While this continues to be large , in the last year it has been speculative inflows that have driven reserves up . China 's currency regime needs sharply to reduce the latter and to bring the former to a more reasonable level .
Question: What is the narrator giving a talk on ?
Options: 
A. China 's national sports teams .
B. International finance .
C. China 's surplus of overweight people .
D. China 's foreign policy .


B