Purple Loosestrife Was Introduced into the Great Lakes Region from Europe

Multiple Choice

Purple loosestrife was introduced into the Great Lakes region from Europe and sold as a garden flower. It produces thousands of seeds and has no natural predators there. It now clogs acres of wetlands and is considered a(n) :

A) density-independent species.
B) density-dependent species.
C) predator.
D) invasive species.
E) replacement-level fertility.