In the CNMI, what must a police officer check when stopping a vehicle?

When a police officer stops a vehicle in the CNMI, one of the essential checks they perform is verifying important details about the vehicle itself. This includes checking the manufacturer's serial number and engine number. These identifiers are crucial for confirming the vehicle's identity, ownership, and any potential criminal activity related to the vehicle, such as theft.

In contrast, the other choices do not hold the same level of relevance in this context. Checking a driver's email address or the vehicle color and make may not provide the necessary legal or identification information a police officer needs during a stop. Similarly, the vehicle owner's home address is not typically required to be verified at the moment of a stop. The focus is primarily on the vehicle's identification numbers, which are standardized methods for recognizing and recording vehicle information.