Net Primary Productivity (NPP)of a Community Is Approximately Equivalent to

Net primary productivity (NPP) of a community is approximately equivalent to

A) gross primary productivity (GPP) .
B) energy used in respiration per unit time.
C) change in biomass of primary producers per unit time.
D) energy captured by plants from sunlight per unit time.
E) gross primary productivity (GPP) plus respiration (R) .