GMAT Critical Reasoning (CR) | According to the last pre-election poll in Whippleton

Polls said people want government to work on pollution, crime, and unemployment,in order of importance.

Elections ruled out those people who were strongly supporting anti pollution.

Still elections were correct. We need to find out why.

We can say may be these elections show some other benefit of selecting those who were opposing anti pollution laws.

(A) some voters in Whippleton do not believe that pollution needs to be reduced. -->Some donot believe, what about others? We don't know.