Since the Realized Niche and the Fundamental Niche Are Not

Since the realized niche and the fundamental niche are not typically the same, this illustrates that:

A) two different species cannot share the same niche.
B) resource partitioning is necessary for two species whose fundamental niches overlap to survive.
C) interspecific competition is necessary for two species whose fundamental niches overlap to survive.
D) communities with greater species diversity have more unrealized fundamental niches.
E) complex interactions among numerous species produce each species' realized niche.