Concept:Large firms often enjoy cost advantages from their own growth, called internal economies of scale.
Explanation:A large firm produces more than a small firm.
This higher production allows it to use better machines, divide labour, and buy inputs in bulk.
These advantages arise within the firm as it expands its scale of production.
Therefore, the benefit is an internal economy of scale.
It is not caused by external industry factors, nor is it a disadvantage.
Answer:C. internal economies of scale.