?I need help with this problem. The first sentence the choices are public or private

A stock market is a market for trading a company's stocks and derivatives. In a dealer market, some dealers hold a certain inventory of specific securities and create a liquid market by purchasing and selling their inventories. These dealers make a market and are thus called market makers. Agents in the market bring investors to the dealers through a network of terminals and electronic systems. Where do dealer profits come from in a dealer market? Interest charges The bid-ask spread Dividend payments A trader is willing to purchase 1,000 shares of XYZ stock for a purchase price of $31.25 per share. Another trader is willing to sell 1,500 shares of XYZ stock at a selling price of $31.50 per share. Select the most appropriate values in the following table: Considering the number of shares that the dealer can buy from one trader and immediately sell to another trader, what will be the dealer's profit from this transaction, excluding any inventory effects? $250 $125 $31,500 $375