Review the graph above. It shows the trend in the total catch of cod over 70 years. Select the best response for this change.
a
The cod catch is declining due to human population decline and less demand for food.
b
Overfishing has led to cod population growing and outcompeting other fishes.
c
Cod populations have dropped to unsustainable levels, preventing the same quantities caught in the past.
d
Cod populations have been under fished and have over-reproduced.
c
Cod populations have dropped to unsustainable levels, preventing the same quantities caught in the past.