One of the Challenges with Using Problem Inventory Analysis as a Method

One of the challenges with using problem inventory analysis as a method of generating new product ideas is __________.

A) careful evaluation of the results are required to ensure that they do actually represent a new business opportunity
B) limiting the method to identifying product ideas for further evaluation
C) wasting consumers' time by focusing only on problems and not opportunities
D) limiting the number of problems that need to be identified for each general product category
E) None of the answers apply.