Which of the following would be considered an assurance engagement? a. giving an opinion on a prize promoter’s claims about the amount of sweepstakes prizes awarded in the past. b. giving an opinion on the conformity of the financial statements of a university with generally accepted accounting principles. c. giving an opinion on the fair presentation of a newspaper’s circulation data. d. giving assurance about the average drive length achieved by golfers with a client’s golf balls. e. all of the above.