In an Attempt to Control Aphids That Are Destroying His

In an attempt to control aphids that are destroying his plums, a farmer in Iowa imports a colony of Asian ladybugs that feast on the aphids. The local ladybugs cannot keep up with the aphid population. The Asian ladybugs are not eaten by the local bird populations, which do feed on the local ladybugs. The Asian ladybug population multiplies quickly, displacing the local ladybugs, cleaning up the aphids, and moving on to eat other local insects. The Asian ladybug:

A) is responsible for habitat fragmentation in the plum orchard.
B) is increasing the biodiversity of the orchard.
C) is being overexploited.
D) qualifies as an invasive species.
E) is a threatened species.