An indication that a promise in a contract should be considered a separate performance obligation is Select one: A. That it does not require the use of other readily available resources that the customer currently does not own. X B. That the additional promise is in the form of a customer option that is available to other interested parties without entering into the contract. C. That the seller regularly sells the good separately through online sales. D. That the additional promise is in the form of a volume discount that adjusts prices of past purchases when a specified volume is met