Which experimental design below would provide students with information about how the presence or absence of enzymes affect organisms?


(A) Monitor the energy level earthworms where one group has unlimited water available and one group has limited water availability.


(B) Placing plants in phosphorus rich environments and monitor their growth compared to plants placed in an environment without phosphorus.


(C) Placing plants in hypertonic environments and monitor their growth compared to plants placed in a hypotonic environment.


(D) Monitor the energy level of earthworms where one group has very few mitochondria and therefore lower levels of ATP synthase.