Answer:
Quality Control
Step-by-step explanation:
The most likely occupation of David would be quality control.
The quality control unit is a section of a company that ensures that products or services produced by the company meet some specific standards as required by authorities. Quality control officers randomly test produced batches of goods to ensure that the required standards are met.
In the illustration, the body overseeing the standards of drugs is the Food and Drug Administration and the work of David is to ensure that the drugs produced meet the required standards set by the body. He is a quality control officer.