The Three Locations Where a Nutrient May Be Found in an Ecosystem

The three locations where a nutrient may be found in an ecosystem are

A) An exchange pool where the nutrient is readily available to producers; reservoirs that serve as long term storage and living organisms that act as short term storage.
B) An exchange pool that serves as long term storage; reservoirs where the nutrient is readily available to producers and living organisms that act as short term storage.
C) An exchange pool that serves as short term storage; reservoirs where the nutrient is readily available to producers and living organisms that act as long term storage.
D) An exchange pool that acts as short term storage; reservoirs that act as long term storage and living organisms where the nutrient is readily available to producers.
E) An exchange pool that serves as long term storage; reservoirs that act as short term storage and living organisms where the nutrient is readily available to producers.