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