Two friends are each cooking a different dish for a dinner party. One's recipe calls for one lemon. The other friend's recipe also calls for one lemon. Unfortunately, there's only one lemon left in the house and there's no time to get another. However, they discover that one recipe calls for the zest or rind of one lemon, while the other friend's recipe calls for the juice of one lemon. So, they remove the zest or rind of the lemon for one recipe, and then give the lemon to the other friend, who squeezes out the juice for her recipe. Both are therefore able to cook their recipe properly. This is an example of what?

1. Distributive (win-lose or zero sum) negotiation
2. Integrative (cooperative or win-win) negotiation
3. ZOPA negotiation
4. Term negotiation