Do Connections Between Habitat Patches Actually Increase Their Diversity? Evidence

Do connections between habitat patches actually increase their diversity? Evidence from current field research involving plants is determining that ________.

A) no, corridors connecting habitat patches have yet to make a difference
B) only if adequate fertilizers and pesticides are applied to the habitats
C) yes, corridors connecting habitat patches do increase species diversity
D) only if migrating animals and birds carry seeds between patches
E) no, corridors connecting habitat patches actually decrease diversity