Use the following to answer questions:
Refer to the diagram below. 
-Which of the following represents the regulatory sequence of the DNA?
Definitions:
Marginal Cost
The expenditure required to create one more unit of a product or service.
Retail Price
The total price charged for a product sold to the end consumer, inclusive of all taxes and charges.
Five-firm Concentration Ratio
An indicator of market concentration, measuring the combined market share of the top five firms within an industry.
Market-clearing Quantity
is the quantity of goods or services at which supply equals demand, so there are no surpluses or shortages in the market.
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