John's utility function is U = 3500715 where I is his annual income. Which of the following best describes his attitude to risk? OA. He is indifferent between a sure gain of $1,500 and a 50% chance of gaining $2,500 and a 50% chance of gaining $500 OB. He prefers a 50% chance of gaining $2,500 and a 50% chance of gaining $500 to a sure gain of $1,500 OC. None of the listed options OD. He prefers a sure gain of $1,500 to a 50% chance of gaining $2,500 and a 50% chance of gaining $500