Which Statement Best Describes the Relationship Between Snow Geese and Plants

Multiple Choice

Which statement best describes the relationship between snow geese and plants in the salt marshes that border the Hudson Bay?

A) At all densities, the geese benefit the plants.
B) At all densities, the geese harm the plants.
C) At low densities, the geese benefit the plants; at high densities, the geese harm the plants.
D) At low densities, the geese harm the plants; at high densities, the geese benefit the plants.