Which of the following is a consequence of altering a vehicle's mileage?

Altering a vehicle's mileage is considered odometer fraud and is illegal. Engaging in such practice can lead to severe legal consequences, including criminal charges for fraud. This can result in fines, restitution, and even imprisonment, depending on the severity of the offense and the laws of the state. Additionally, this action undermines the trust of buyers and the integrity of the vehicle sales industry, leading to legal penalties to deter such behavior.

While reduced resale value, increase in customer inquiries, and favorable loan approval rates are potential outcomes related to vehicle sales, they do not directly result from altering mileage in the same way that legal consequences do. These other options may reflect the market dynamics or customer behaviors but don’t capture the seriousness of the legal implications involved in manipulating a vehicle's odometer reading.