Some people in an office building are experiencing nausea and vomiting. Which of these strategies would not help reduce the pollutants that may be responsible for these symptoms?

A)

providing smoking workers with an area where they can smoke

B)

cleaning the ventilation system of the building

C)

cleaning areas in the building that may have biological irritants

D)

changing the insulation material used in the building

E)

finding sources of heavy-metals pollution and developing a plan to decrease their effect