The former chairman of Nestl$$ recently told an interviewer: $"$We are food and beverages. We are not running bicycl shops. Even in food, we are not in all fields. There are certain areas we do not touch. Also, we have no soft drinks because I have said we either buy Coca$-$Cola or we leave it alone." What strategic marketing principle does the chairman's comment emphasize most specifically?

myopia

competitive advantage

customer value

focus

policy of dealing only with Swiss businesses