Which of the following is a way that cell phone use can impact a driver’s focus on the road?

Cell phone use can significantly impact a driver's focus on the road in various ways. Each of the mentioned activities—checking notifications, dialing, and texting—requires cognitive and visual attention that diverts focus from driving.

When a driver checks notifications, they may take their eyes off the road and interrupt their attention to the task at hand, critically reducing their situational awareness. Similarly, dialing a number involves not only looking at the phone but also mentally processing information, both of which can distract from monitoring surrounding traffic and road conditions.

Texting represents a particularly severe type of distraction, as it typically involves reading and composing messages, which necessitates visual attention to the screen. This activity can take the driver’s focus away from driving for several crucial seconds, increasing the risk of accidents.

Since all these actions compromise a driver's concentration and safety, the comprehensive recognition that each activity contributes to diminished focus supports the assertion that all of them are detrimental when it comes to driving. Thus, the correct answer encompasses all these factors as contributing to distracted driving.