The answer for the question 30 is B.

I don't know why. I need an explanation.

Use this graph below to answer the following two questions. The graph below shows Marginal IlEost {MC}. Average Total Cost {ATE} of a monopolist and the demand curve in the market. Suppose the demand curve is linear. I', MC. ATE Demand Curve 29} Suppose the monopolist cannot price discriminate {charges the same price to each consumer}. Then the equilibrium [monopoly] quantity is and the prot Ls . a} 5|}; 300D b} 5|}; 45cm c} 3|}; IEDD d} 3|}; EDD 3H} Suppose the monopolist can perfectly price discriminate {charge different price to each consumer]. Then the equilibrium {monopoly} quantity is and the prot is . a} SI}; 3003! 1:} 5|}: d c} 3|}; 241113\" d} 3|}; l