Some careers, like postal worker and department store employee, are expected to decline in the next decade. Which best explains why the outlook for business careers is so different?

Virtually all companies will need to depend on some business skills.
Professions that are in decline have no connection to business careers.
Business careers will decline as well, but not to the same extent.
Service companies will need business skills more than those with products.

Virtually all companies will need to depend on some business skills. This is the best explanation as business skills are essential for the success and growth of any organization, regardless of its industry or sector. As such, the demand for individuals with strong business skills is expected to remain high in the coming years.