Which of the following is considered an example of optional vocational services?

GED classes are considered optional vocational services because they provide individuals with the opportunity to further their education and enhance their skills, which may improve their employability. These classes are not mandatory for everyone; rather, they are available to those seeking to obtain their General Educational Development certification, which can open up more job opportunities or allow individuals to pursue more advanced vocational training.

Other options mentioned, while they can be valuable for individuals in the workforce, do not fit the same category of "optional vocational services." Full-time employment offers represent job opportunities rather than services aimed explicitly at skill enhancement. Job placement services, on the other hand, facilitate the transition into the workforce but are often considered essential support rather than optional supplemental services. Health and wellness programs might improve overall well-being but are typically focused on physical and mental health rather than vocational skills directly. Therefore, GED classes distinctly stand out as optional services aimed at enhancing vocational qualifications and opportunities.