Question: A recent city initiative to plant trees along major roadways was followed by a measurable reduction in air pollution levels. Which of the following, if true, best explains this result? Need Assignment Help? (A) Trees can absorb pollutants and improve air quality. (B) The city simultaneously implemented stricter vehicle emissions regulations. (C) Other cities with fewer trees also reported a reduction in air pollution. (D) Residents in the city began using public transportation more frequently. (E) The tree-planting initiative focused on areas with the highest levels of pollution.