What is the name of the sewage treatment worker?

The correct choice recognizes David Smith as the sewage treatment worker. This specific name may have been included in the context or materials related to the course material, highlighting key figures or fictional representations used for illustrative purposes within training scenarios or discussions about sewage treatment processes.

Names provided in multiple-choice questions often serve to personalize the material or link it to specific case studies or examples that might help learners relate better to the content. While other options could represent equally valid names, selecting David Smith suggests familiarity with the context that pertains to training or assessments within sewage treatment operations.