David's marketing research returned the finding that customers were staying away from his bookstore because of a lack of services like gift cards, return policies, and special orders. david was shocked. "nobody ever asks about that stuff! if it were that important, people would ask about it." david is likely suffering from a(n) gap.
(a) knowledge
(b) standards
(c) ethics
(d) delivery
(e) communications

The knowledge gap can be filled with a knowledge management strategy. It involves identifying the knowledge gap and vulnerabilities and setting strategies for each of these gaps. There are three types of gaps in strategic management: Knowledge gap, strategic gap, Relations gap. The knowledge gap occurs when the company doesn't know what it needs to know. similarly, David lacks the knowledge that the customers were staying away from his shop because of the lack of services.