In a nutrient cycle, the function of the reservoir is to

• A

  maintain imbalance in the rate of influx and efflux. 

• B

  meet the deficit which occurs due to imbalance in the rate of influx and efflux.

• C

  generate deficit and maintain imbalance in the rate of influx and efflux. 

• D

  removes surplus of nutrients from the environment and creates an imbalance of the nutrients in the environment.