this is a multiple choice question

The risk premium of a gamble for a particular consumer is: a) the difference between the expected monetary value of the gamble and the dollar amount whose utility equals the expected utility of the gamble; b) the difference between the expected utility ofthe gamble and the certainty equivalent of the gamble; c) the difference between the expected monetary value of a gamble and the expected utility of the gamble. d) a measure of the consumer's risk aversion; e) a) and d) are both true