Which of the following actions would be considered an unethical or prohibited business practice under the nasaa statement of policy on unethical or dishonest business practices of broker-dealers and agents? a) a properly licensed agent offering an unregistered exempt security for sale b) an agent borrowing money from an individual retail client who is a mortgage broker c) an agent stating that he has passed a qualification examination d) an agent suggesting that her client buy a stock on one exchange and sell it at the same time on another to take advantage of a temporary price disparity