Which of the Following Sustainable Factors Helped to Save America's

Which of the following sustainable factors helped to save America's forests from destruction during the 20^th century?

A) conservation of forests by creation of the National Forest Service
B) technology driven mass production of construction materials from plastics
C) economic policies that allowed the importation of wood from tropical rainforests
D) conservation efforts that resulted in a reduction in the demand for wood products
E) overall decline in the United States population