Which of the following roles does advertising potentially play? Choose any and all of the following that are correct. Incorrect choices will be penalized.
Select one or more:
__ a. it may be used to promote competitive outcomes by providing information
__ b. it may be used as a mechanism to solve the adverse selection problem
__ c. it may be used by firms to increase the price elasticity of demand for their products
__ d. it may be used as a mechanism for firms to gain market power
