Who conducts chemical testing and oversees the collection of specimens?

The correct answer, which states that FFD (Fitness for Duty) Staff conduct chemical testing and oversee the collection of specimens, highlights the specific role of these individuals within an organization. FFD Staff are often responsible for managing the logistical aspects of drug testing, including ensuring that the collection process complies with relevant regulations and standards. Their training typically encompasses proper specimen collection procedures, chain of custody protocols, and maintaining participant confidentiality, which is crucial for the integrity of the test results.

In this context, the other roles mentioned, such as Substance Abuse Experts and Medical Review Officers, serve different functions. Substance Abuse Experts primarily focus on the educational and evaluative aspects of substance abuse issues, while a Medical Review Officer usually deals with interpreting the results of the tests and making clinical determinations based on them. Supervisors may have a role in referring employees for testing or monitoring compliance, but they do not typically handle the actual procedures involved in collection and testing. This differentiation in responsibilities clarifies why FFD Staff is the most appropriate answer for conducting chemical testing and overseeing the collection of specimens.