Belk has a chain of department stores across the South. Top management requires that each store manager collect, maintain, and respond to customer complaints (emails, letters, calls, etc.). Each store manager is supposed to keep a list of complaints that have been received. Top management is considering establishing a more formalized method of monitoring and evaluating the response managers give to the complaints. They want some information that will tell them whether they need to develop such a formalized program or whether they can leave well enough alone and allow managers to use their discretion in handling the complaints. They want to review a sample of these complaints and the responses to them. What sampling plan should be used? Why? (4 points)