The Introduction of Brown Tree Snakes to Guam Reduced the Visits

The introduction of brown tree snakes to Guam reduced the visits per tree per day of insect and bird pollinators.Which of the following choices explains what happened as a result of this reduced pollinator activity?

A) Recruitment of new trees increased
B) There was no effect on to the species or community as a result of this reduced pollinator activity
C) There was low recruitment of new mangrove trees on Guam relative to non-invaded islands
D) There was high recruitment of new mangrove trees on Guam relative to non-invaded islands