The Manager of a Company Selling Cellular Phones in Rural

The manager of a company selling cellular phones in rural U.S.markets asks you to conduct survey research into the following question: What percentage of people in Kansas live in communities of less than 10,000 people? The problem with this research objective is that

A) it is irrelevant to the cellular company.
B) it is already known and available from the U.S.Census Bureau.
C) it will lead to a set of unstructured questions.
D) it is a research question that probably cannot be answered with any level of accuracy.
E) it is too expensive to determine the answer.