Final answer:
Streamlining is the correct answer as it refers to simplifying processes to increase efficiency and make better use of resources, often leading to economies of scale.
Step-by-step explanation:
Changing a supply line to make it more efficient and better use of resources is an example of C.Streamlining. Streamlining is the process of simplifying or eliminating unnecessary steps to improve efficiency and effectiveness. When industries, such as utility companies, optimize their supply lines, they benefit from economies of scale, which allow them to reduce the cost per unit as the quantity of output increases.
This efficiency can come from various adjustments, such as using advanced technology, improving logistic systems, or redesigning workflows to reduce waste and improve productivity.
Contrastingly, centralization refers to bringing decision-making to a central point within an organization, outsourcing involves contracting out business processes to third parties, and diversification means branching out into new business areas or product lines.