As discussed in the methodology section, understanding age-classes allows the managers to know when the species can reproduce, thereby replenishing fish stocks. Managers can avoid taking age-classes of a species and allow continued reproduction and future populations to flourish. Which of the following statements best describes an age-weighted single species stock measure?
a. Takes the stance that some age-classes in a stock are more important than others
b. Does not consider the different economic value of age-classes
c. Uses a levy index to assign different taxes based on age composition and biomass
d. Ensures that species are taken at age classes just before reproduction when fish stocks might be replenished