Scientists calculated the net primary productivity at two different forest sites. both forests have the same gross primary productivity. forest a has a net primary productivity of 1,650kcal/m^2/year, and forest b has a net primary productivity of 1,110kcal/m^2/year. which of the following statements is best supported by the data?

a. forest a has a higher rate of decomposition by bacteria than forest b.
b. forest a has more biodiversity than forest b.
c. forest a producers have lower rates of cellular respiration than forest b producers.
d. forest a producers have more biomass than forest b producers.