If a graph is used to compare total revenue and total cost of a perfectly competitive firm, then the horizontal axis of the graph will represent the
and the vertical axis will represent
OA. price, measured in dollars; quantity of goods produced
O B. total costs measured in dollars; quantity of goods produced
OC. quantity produced; both total revenue and total costs, measured in dollars.
OD. quantity produced; total revenue and total variable costs, measured in dollars.