How Does the Tsukiji Fish Market Demonstrate the Nature of a Global

How does the Tsukiji fish market demonstrate the nature of a global commodity chain?

A) One can trace the hands through which fish pass in a network that connects previously unconnected people and locations.
B) Merchants in Tokyo opted to sell only local produce to make the market more sustainable.
C) The market has become the largest tourism attraction in Tokyo.
D) It is a shifting of core and periphery because goods and money are flowing from the periphery to the core.