What is the difference between a negotiator's interests and their positions?

a$.$

A negotiator's interests are their emotions, while their positions are their logic.

b$.$

There is no difference between the two.

c$.$

A negotiator's interests are their past experiences, while their positions are their future goals.

d$.$

A negotiator's interests are their underlying needs and motivations, while their positions are their stated demands.

e$.$

A negotiator's interests are their stated demands, while their positions are their underlying needs and motivations.