Kudzu, a plant native to eastern Asia was introduced into America in 1876. In 1935, kudzu was planted along southern roadways to control soil erosion. Adding a foot of vine a day in the spring and summer, kudzu quickly grew out of control. Why can introducing a new species to an existing ecosystem often be a disaster?

A. The new species can rapidly evolve into a dangerous subspecies that cannot be destroyed.
B. The new species can harm native organisms and damage the ecosystem.
C. The new species can create excess nutrients in the soil that can damage native species.
D. The new species can eventually become extinct.