Which of the following is allowed when using a GPS for drivers over 18?

Answer: B — Must be mounted

When using a GPS while driving, especially in Massachusetts, it is important to prioritize safety and minimize distractions. The requirement for the GPS to be mounted ensures that the driver's attention is primarily on the road rather than on holding or manipulating a handheld device. This mounting requirement helps to maintain focus, reduces the likelihood of accidents, and adheres to regulations designed to prevent distracted driving. Using a handheld GPS can lead to distractions, as drivers need to look away from the road to interact with it. Bluetooth usage can facilitate hands-free operation, but it does not negate the need for the device itself to be safely positioned. Therefore, having a GPS that is securely mounted allows drivers to glance at directions while keeping their hands on the steering wheel and their eyes on the road, enhancing overall driving safety.