Final answer:
Both certified operators and licensed individuals are required to keep records of pesticide applications, as per environmental and public health regulations.
Step-by-step explanation:
The correct option is D:
The individuals required to keep records of pesticide applications are both the certified operator and the person holding a license, which makes the correct answer 'D' - both A and C.
In many jurisdictions, there are strict guidelines and regulations (like the USDA organic seal standards) regarding the use of pesticides and the record-keeping associated with their application. Those holding a certification or license in pesticide application need to document each pesticide application, which includes details such as the date, location, the type of pesticide used, and the amount applied. This documentation is crucial for ensuring compliance with environmental regulations, enabling traceability, and providing important data for studies related to public health and safety, as well as the environment.
For example, aircrafts that conduct pesticide spraying, as depicted in images by jetsandzeppelins, must also comply with these regulations. The certified operator is responsible not only for the proper application of pesticides but also must oversee that application records are maintained accurately.
These regulations align with content guidance from resources like 'Human Biology' by CK-12, demonstrating the significance of understanding the impact of pesticides not just on the target pests but also on human health and the wider ecosystem.