Critical Reasoning

A cellular communication development facility was built just outside the town of Qwertyville. Five years later almost 28% of the population have experienced cases of abnormal cell growth. Recently, a cellular company has applied to the town council of Iopville for an approval to build a development facility there. The Iopville council should not allow the building of such a facility on its outskirts since its population would suffer like that of Qwertyville.

Which of the following would be most useful to establish in order to evaluate the argument above?

A. Whether the tests administered to the residents of Qwertyville check for abnormal cell growth alone or for additional disorders
B. Whether the cellular development facility built outside Qwertyville uses the same water supply as the town's residents
C. Whether the percentage of abnormal cell growth cases in Qwertyville is higher than that of other towns without such development facilities nearby
D. Whether a direct relationship between using a cellular phone and abnormal cell growth has been established based on adequate research
E.Whether the population of Iopville is as involved in current town activities as that of Qwertyville

OA C

Source: Economist Gmat