How Might the Extinction of Some Pacific Island Bats Called

How might the extinction of some Pacific Island bats called "flying foxes" threaten the survival of over 75% of the tree species in those islands?

A) The bats eat the insects that harm competitor plants.
B) The bats consume the fruit including the seeds that would be part of the trees' reproductive cycle.
C) The bats roost in the trees and fertilize soil around the trees with their nitrogen-rich droppings.
D) The bats pollinate the trees and disperse seeds.
E) The bats pierce the fruit, which allows the seeds to germinate.