At the equilibrium quantity, marginal benefit is marginal cost. Consuming means that some mutually beneficial exchanges do not take place, and producing means that some goods go unsold.

Which of the following services will be provided by a full-service broker but not by a discount broker? i. research of potential investment opportunities ii. purchase and sale of stock at your request iii. recommendation of investments a. i and iii b. ii only c. iii only d. i, ii, and ii