Bill finds that the marginal utility he receives from an IMAX movie is 45 units of utility and that the marginal utility he receives from a regular movie is 20 units of utility. The price of an IMAX movie is $15 and the price of a regular movie is $10. To Maximize his utility, Bill should: ( a) increase his consumption of IMAX movies b) increase his consumption of regular movies O c) not change his consumption of IMAX movies and regular movies O d) not enough information is provided to know if Bill would select an IMAX movie or a regular movie