The price of a McDonald's dinner is $5; the price of a Burger King dinner is $5. The marginal utility you would get from the next McDonald's dinner is 15; the marginal utility you would get from the next Burger King dinner is 20. You should:
A. consume more McDonald's dinners.
B. not consume either Burger King or McDonald's dinners.
C. consume more Burger King dinners.
D. realize you cannot make a rational decision.