How many passengers must a vehicle be designed to transport for compensation to be considered a Commercial Motor Vehicle?

A vehicle is classified as a Commercial Motor Vehicle when it is designed to transport passengers for compensation and can accommodate a specified number of passengers. The definition typically requires the vehicle to be intended for the transport of 8 or more passengers, including the driver. This aligns with safety regulations and the need for special licensing and endorsements for those who operate larger vehicles.

In the context of the provided options, the correct answer is based on the definition established by the Federal Motor Carrier Safety Administration (FMCSA) and other regulatory guidelines that define commercial transportation. Specifically, if a vehicle is designed to carry 8 or more passengers, it is classified as a Commercial Motor Vehicle. Vehicles designed to carry fewer passengers do not meet this criterion, thus they are not considered commercial under the regulations.