Suppose you and your roommate have the following agreement when it comes to cleaning your apartment: each person washes her or his own dishes after each meal. the principle of trade you just learned tells you that it would be more efficient if: a) both of you wash your own dishes after each meal. b) neither of you wash the dishes after eating. c) each of you wash half of all the dirty dishes. d) one of you wash all the dishes while the other does a different chore.