In the Development of a Consumer Appliance Product Survey Which

In the development of a consumer appliance product survey which of the following data would likely aid the process?

A) An analysis of customer complaints received II. Satisfaction data from a customer focus group III. Number of product defects detected prior to shipments IV. Warranty registration data
B) I only
C) I, II, III, and IV
D) I and II only
E) I, II, and IV only