online reverse auctions are best suited for situations where
A) the buyer is prepared to switch suppliers if necessary.
B) there is a competitive supply market with qualified suppliers willing to participate.
C) specifications are clearly defined and there is a competitive supply market with qualified suppliers will to participate.
D) specifications are clearly defined.
E) specifications are clearly defined, there is a competitive supply market with qualified suppliers willing to participate, and the buyer is prepared to switch suppliers if necessary