Which type of economic graph reveals trends in data?

When producers (say, of roads) are not able to make all consumers pay for enjoying their product (i.e., the roads), they tend to see a:

A. Marginal cost of production that is too low, and there is a supply-side market failure B. Marginal benefit of production that is too high, and there is a demand-side market failure C. Marginal cost of production that is too high, and there is a supply-side market failure D. Marginal benefit of production that is too low, and there is a demand-side market failure

Two stores—Lazy Guys and Ralph's Recliners—are located in the same city. Both stores buy recliner chairs from the same manufacturer at the same price and both stores are about the same size, so that the fixed costs of production for both stores are

the same. Ralph's Recliners sells more recliners per month and Ralph's has a lower average total cost of production. Which of the following can explain why the average total cost of production is lower for Ralph's Recliners? A) Because Ralph's Recliners sells more output its average fixed costs are lower than Lazy Guys' average fixed costs. B) The rent Lazy Guys pays for its building is greater than the rent paid by Ralph's Recliners. C) Ralph's explicit costs are less because Ralph owns the land on which his building is located. Lazy Guys must make lease payments for the land on which its store is located. D) The price of recliners charged by Ralph's is greater than the price charged by Lazy Guys.