In the United States, the Recovery Rate for Plastic Wastes

In the United States, the recovery rate for plastic wastes

A) has been declining as the use of plastics has been decreasing over time
B) has been rising because of low-cost methods for sorting by resin content
C) is waning because of the absence of lucrative markets for all recycled plastics
D) is generally low because of costly steps in the plastic recycling process