What is the preferred method of controlling environmentally hazardous materials during manufacturing, operations, and disposal?

A. Source reduction or elimination is the most highly preferred control strategy.
B. Treatment of hazardous wastes is preferred over recycling because of lower manufacturing costs.
C. Disposal is the preferred method because of new technologies and improved landfill processes.
D. Recycling is preferred over source reduction because reuse of hazardous substances costs less than substituting alternate processes.