In which of the following instances is a low-cost provider strategy least likely to be appealing and competitively powerful? When most buyers use the product in different ways and buyers incur high costs in switching their purchases from one seller to another When the products of rival sellers are essentially identical and readily available from many eager sellers When it is hard to achieve product differentiation in ways that have value to buyers and when industry newcomers use introductory low prices to attract buyers and build a customer base When price competition in vigorous When a big fraction of the industry's sales are made to large-volume buyers with significant power to bargain down prices