In Many Wetlands, Nonnative Purple Loosestrife Has Become the Dominant

In many wetlands, nonnative purple loosestrife has become the dominant plant species, often accounting for 90% of the total plant mass. The populations of cattails, canvasback ducks, and bog turtles have decreased in areas with purple loosestrife.
-Canvasback ducks and bog turtles are likely impacted by purple loosestrife by

A) loss of food.
B) loss of diversity.
C) overexploitation.
D) pollution.
E) climate change.