An industrial tool manufacturer relies on a distributor network with the largest online outlet and store network aimed at construction workers. the distributor network is seeking a manufacturer to provide them with private label products. they've decided they will offer only their own product line and not any other brand in this category of industrial tools. now the industrial tool company must decide whether to agree to this proposition or lose this company as a customer. this is an example of which of the competitive forces at play in this industry?