The home builder reasons from evidence about most residential fires to a conclusion about the effectiveness of sprinklers in preventing property damage. But this reasoning is faulty because of the possibility that most of the property damage results from the minority of fires excluded from the builder’s evidence. That possibility is realized if E is true.
Thus, E is the best answer. Because the builder’s argument concerns neither the cost of installing sprinklers not a comparison with fire department performance in other locations, C and D are irrelevant. The evidence the home builder cites suggests that formal training is not needed in order to extinguish fires.
So A is not the correct answer. B supports the builder’s view that requiring sprinklers would have a limited effect.