Statement: "Major cities face rising pollution levels."Inference:

Explanation

The correct inference from the statement "Major cities face rising pollution levels" is that urban activities contribute to pollution. This is because urban areas typically have higher concentrations of vehicles, industries, and other pollution sources. Option A correctly identifies this relationship. Option B incorrectly implies a comparison to rural life, which is not addressed by the statement. Option C makes a broad claim about smoke that doesn't relate to urban pollution specifically. Option D is incorrect as it contradicts the statement by suggesting cities are cleaner, which is the opposite of what is indicated.