Final answer:
Jobs grouped according to traditional business tasks such as marketing and human resources are grouped by business function.
Step-by-step explanation:
The correct answer is c. business function. Jobs grouped according to traditional business tasks such as marketing and human resources are grouped by business function. Business function refers to the different areas or departments within a business that carry out specific tasks related to the overall operations and goals of the organization. For example, marketing is a business function that involves promoting and selling products or services, while human resources is a business function that focuses on managing and developing the organization's workforce.