In an Asian Rice Paddy, Carp Eat Algae Around the Base

In an Asian rice paddy, carp eat algae around the base of rice plants while a snail scrapes algae from the leaves and stem. The carp and snails can coexist in the same rice paddy because they

A) occupy the same habitat but use the resources differently.
B) occupy the same habitat and use the same resources.
C) use the same resources but occupy different habitats.
D) occupy different habitats and use the resources differently.
E) work according to the competitive exclusion principle.