How Did the Introduction of Foreign Plants and Animals Alter

Multiple Choice

How did the introduction of foreign plants and animals alter the Western environment?

A) A lack of predators allowed them to spread rapidly and disrupt the ecosystem.
B) Many of the new animal species decimated the native buffalo population.
C) The introduction of cheatgrass from Asia harmed livestock that grazed on it.
D) New water plants choked and poisoned river systems.