In the Past 45 Years, People Who Fish Are Catching

In the past 45 years, people who fish are catching fewer large carnivorous fishes worldwide. Which of the following statements best explains the significance of this fact?

A) Humans will have to begin eating fish that are primary consumers, meaning we will gather less energy from each fish eaten than if we ate secondary consumers.
B) The large fish have been hunted to near extinction, and this will affect the populations of both their predators and their prey.
C) The large fish have moved to areas of the ocean where fishing is less intense.
D) Humans will have to become producers in order to gather the maximum amount of energy from marine food webs.