The connection between transportation and the environmental impacts of urban areas.

Mobile transportation, like: private cars, jeepneys and buses use energy and burn petroleum. During the combustion process, these mobile transports exhaust fumes that contain nitrous oxides, carbon dioxide and other particulates that pollutes the air and contributes to global warming.

As an additional information, China is considered as the country to produce most fossil fuel CO2 emission in 2015, followed by the United States.

The answer is b, as with an inference you make a statement with no evidence