If the premerger Herfindahl index is less than 1,000 . the Department of Justice is likely to challenge a merger

Why are prices for groceries and household items typically higher at a 24-hour convenience store compared to stores open from 6 am to 11 pm?

A) Shoppers' options are generally fewer in the middle of the night. B) The elasticity of demand of the middle-of-the-night shopper is typically higher than the mid-day shopper's elasticity. C) The owners of the 24-hour stores are typically more selfish than the others. D) The owners of the 24-hour stores are more interested in maximizing net revenue compared to the others.

The table above shows three production methods to produce 100 automobiles per day. If the price of labor is $20 per unit and the price of capital is $100 per unit, which of the three methods is economically efficient?

A) Method A only B) Method B only C) Method C only D) All three methods are economically efficient.