The Photograph Below Is of the Tsukiji Market in Japan

The photograph below is of the Tsukiji Market in Japan. Which of the following statements describes why there are so many Bluefin Tuna available for purchase?

A) Dams on rivers trapped many Bluefin Tuna that were migrating upstream to spawn.
B) Water pollution from pesticide runoff impaired the swimming ability of Bluefin Tuna in coastal areas so they were more easily captured in fishing nets.
C) Bluefin Tuna are being overfished in certain parts of the ocean.
D) Global climate change is disrupting Bluefin Tuna migration paths and they now move directly in the main shipping channels and have to be captured to reduce potential damage to cargo ships.