Which of the following IS NOT one of the five conditions of exchange in marketing?

Select one:

a$.$ There must be at least two parties to the exchange.

b$.$ Each party believes that it is desirable to exchange with the other party.

c$.$ Each party has something of value to offer the other party.

d$.$ Each party must be capable of immediate delivery.

e$.$ Each party must be free to accept or reject the exchange.