Natural gas is a natural monopoly. The figure above shows the market for natural gas in the city of Lucknow. When a marginal cost pricing rule regulation is imposed, the price per household per month is   Group of answer choices $10 and the firm makes makes zero economic profit $20 and the firm makes an economic profit $20 and the firm will make an economic loss $30 and the firm makes an economic profit $10 and the firm will make an economic loss