Which of the following, if true, provides the most logical completion of the passage below  Cars fueled by methanol have a much lower level of emissions of pollutants such as carbon monoxide and environmentally harmful hydrocarbons than gasoline-fueled cars do
Methanol fuel does produce somewhat higher formaldehyde emissions than gasoline does
most formaldehyde pollution generated by gasoline-powered cars results from the photo-chemical conversion of hydrocarbon emissions into formaldehyde in the atmosphere