Identify which statement is true of online gaming. O a. Many mobile games use advertising to generate revenue for the game developers. b. Fantasy games are more appropriate for marketing than social and real-world-like games. c. Online gaming restricts marketers from engaging with customers. d. Massive multiplayer online games attract six- to ten-year-olds. O The total revenue of a firm is calculated by multiplying the number of units sold by the a. price b. discount c. profit margin d. overhead cost of each unit.