Who is allowed to purchase restricted use pesticides?

The correct option emphasizes that the purchase of restricted use pesticides can only be made by or under the supervision of a certified applicator. This regulation is in place due to the potential risks associated with restricted use pesticides, which can be harmful if misused or applied improperly. Certified applicators have undergone specific training and have demonstrated their knowledge of pest control practices and safety protocols, ensuring that they are capable of handling these substances responsibly.

This requirement is designed to protect both the environment and public health, as restricted use pesticides are typically more potent and can pose hazards if not applied correctly. The certification not only grants the applicator the knowledge necessary for safe application but also enforces accountability, ensuring that a trained individual is aware of the legal and environmental implications related to pesticide use.

In contrast, the other options suggest broader or less regulated access to these substances, which does not align with the safety and regulatory standards set for restricted use pesticides. The necessity for supervision by a certified applicator highlights the importance of professional expertise in managing these chemicals effectively.