What function does the TAC system primarily serve regarding emissions?

The TAC (Tailpipe Aftertreatment System) serves the primary function of reducing certain emissions from the vehicle's exhaust. This system is designed to treat exhaust gases to minimize pollutants such as nitrogen oxides (NOx), hydrocarbons (HC), and particulate matter (PM) before they are released into the atmosphere. By using components such as catalytic converters and other aftertreatment technologies, the TAC system enhances the effectiveness of a vehicle’s emissions control strategy.

Through proper functioning and maintenance of the TAC system, it helps meet environmental regulations aimed at promoting cleaner air and reducing the impact of automotive emissions on public health and the environment. In contrast, options that suggest increasing emissions, having no effect, or solely altering performance fail to recognize the essential role the TAC system plays in emission reduction, which is critical for compliance with increasingly stringent emission standards.