Which is indicative of the purchase decision stage of the organizational buying process?

A. The purchase decision is usually quick once the information search has been completed.
B. Even after the bid is accepted, further negotiation is likely.
C. Even if several vendors make it onto the bidder's list, ultimately only one can be chosen.
D. If a supplier on the bidder's list is not selected, they are rarely told the reason(s) why.
E. Once an agreement has been formally reached, neither the buyer nor the seller is permitted to make changes.