The availability of oxygen and other electron acceptors is the most important determinant of the types of metabolism in a habitat. Which of the following is NOT true about anaerobic environments?

A) They have slower rates of assimilation compared to aerobic habitats.
B) Their rates of dissimilation are slower compared to aerobic environments.
C) Microbes sometimes use minerals such as NO2- to oxidize organic compounds.
D) Anaerobic microbial biomass far exceeds that of the oxygenated biosphere.
E) Respiration of organic compounds is highly dissimilatory, reducing them to CO₂.