Concept:In stock exchange dealings, the share dealer’s gain usually comes from the margin between the price at which he buys and the price at which he sells.Explanation:The buying price of a share is the lower price a trader pays when purchasing it.The selling price is the higher price at which the trader sells the same share.The difference between these two prices represents the trader’s reward or spread.In securities markets, this specific margin is described as the jobber’s turn or jobber’s profit.Answer:C. Jobber's Profit