An industrial manufacturer that works with one or a few large clients and develops products that only these clients will use is most likely to implement a(n) strategy.

Custom marketing

Explanation: A custom marketing strategy will most likely be employed by an industrial manufacturer that works with one or a few large clients and develops products that only these clients will use. Marketing creates, communicates, and delivers value, and it involves the management of customer relationships. A custom marketing strategy is one in which a manufacturer customizes and develops products that are unique to the needs of his customers and thus is an essential strategy for delivering a personalized customer experience to each segment of clients, thereby increasing loyalty and customer satisfaction.

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;