What must the inspector sign on the MVI-2 form upon approving a vehicle after reinspection?

Answer: B — His/her inspector/mechanic number and inspection sticker number

Upon approving a vehicle after reinspection, the inspector must sign the MVI-2 form by providing their inspector or mechanic number along with the inspection sticker number. This practice is essential as it links the inspector's qualifications and accountability directly to the inspection conducted. The inclusion of the inspector's number serves as a verification step, ensuring that the inspection has been performed by a qualified individual and allows for tracking if any issues arise later regarding the inspection. This requirement not only reinforces the integrity of the inspection process but also helps maintain standards within vehicle safety regulations. The other options, while potentially relevant to different aspects of vehicle inspection, do not fulfill the specific requirement associated with signing off on the MVI-2 form after a successful reinspection.