What does "CAP" testing refer to?

"CAP" testing refers to the Certificate of Approval Program, which is a standardized method used for emissions testing. This program ensures that vehicles meet specific environmental standards set by governing bodies. It involves a systematic assessment process designed to evaluate whether a vehicle adheres to established emissions levels, which are critical for reducing air pollution and ensuring compliance with regulatory requirements.

In this context, the Certificate of Approval signifies that a vehicle has passed the emissions test and is thus compliant with applicable laws. This program not only promotes cleaner air by ensuring that vehicles on the road are not exceeding emissions limits but also aids manufacturers and consumers in understanding the environmental impact of their vehicles. Other options mentioned do not accurately represent the widely recognized use of "CAP" in the context of emissions testing.