Which of the following statements about interests is true?

A) There is only one type of interest in a dispute.
B) Parties are always in agreement about the type of interests at stake.
C) Interests are often based in more deeply rooted human needs or values.
D) Interests do not change during the course of an integrative negotiation.
E) All of the above statements about interests are true.

Interests can be complex and may involve underlying needs or values. It is not uncommon for parties to have different interests or to discover new interests during the negotiation process. A and B are incorrect because there can be multiple types of interests in a dispute, and parties may not be aware of all the interests at stake or may have conflicting views on what those interests are. D and E are incorrect because interests can certainly change during the course of a negotiation.