True or False? the Edgeworth Box Version of Inter-Personal Trade

True or false? The Edgeworth box version of inter-personal trade requires the individuals to be in close proximity of one another.

A) True, that way they can see each other's endowments and prices.
B) False, begin in close proximity is not required for mutually beneficial trade to occur in the Edgeworth box.
C) True, the Edgeworth box only works when there folks see "eye-to-eye."
D) False, although prices are only valid if they are communicated in person.