In this argument, the arguer recommends that C should advise its citizens to install both air conditioners and fans for cooling in order to reduce the cost of electricity. To justify this claim, the arguer provides the evidence that many citizens of C suffer from the rising costs of electricity. In addition, he cites the result of a recent study that using fans alone costs more than using air conditioners alone, and that using both fans and air conditioners costs less than either using fans or air conditioners alone. A careful examination of this argument would reveal how groundless the conclusion is.