PDA helps a driver do what?

The correct choice focuses on the capabilities of a Personal Digital Assistant (PDA) in terms of managing information effectively. A PDA assists drivers by allowing them to gather relevant data—such as traffic conditions, navigation maps, and destination information—filtering this information for relevance, and then acting on it accordingly. This means that a driver can stay informed about their surroundings and make better decisions on the road, improving safety and performance.

The other options do touch on aspects of driving and vehicle management but do not encapsulate the core function of a PDA. For instance, preparing routes and time schedules is a specific use case but does not cover the broader capability of information management that a PDA offers. Enhancing vehicle performance and maintaining speed and distance are more related to the vehicle's mechanics and systems rather than the informational assistance provided by a PDA. Therefore, the first choice accurately reflects the primary role of a PDA in assisting a driver.