The correct answer is not A, it is D.

Explanation:

Green chemistry is the process of designing chemical products and processes in a way that reduces or eliminates the use and generation of hazardous substances. It is also known as sustainable chemistry or environmentally benign chemistry. The aim of green chemistry is to reduce the negative impact of chemical products and processes on human health and the environment.

Green chemistry involves the following principles:

1. Prevention: It is better to prevent waste than to treat or clean up waste after it has been created.

2. Atom economy: Synthetic methods should be designed to maximize the incorporation of all materials used in the process into the final product.

3. Less hazardous chemical synthesis: Wherever possible, synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health and the environment.

4. Designing safer chemicals: Chemical products should be designed to be effective, yet have minimal toxicity.

5. Safer solvents and auxiliaries: The use of auxiliary substances (e.g. solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.

6. Energy efficiency: Energy requirements of chemical processes should be minimized.

7. Use of renewable feedstocks: A raw material or feedstock should be renewable rather than depleting whenever technically and economically practicable.

8. Reduce derivatives: Unnecessary derivatization (use of blocking groups, protection/deprotection, temporary modification of physical/chemical processes) should be minimized or avoided if possible, because such steps require additional reagents and can generate waste.

9. Catalysis: Catalytic reagents (as selective as possible) are superior to stoichiometric reagents.

10. Design for degradation: Chemical products should be designed so that at the end of their function they break down into innocuous degradation products and do not persist in the environment.

Therefore, reducing potentially hazardous waste through smarter productions is called Green Chemistry.