When should you refrain from using the telephone even if you have a hands-free device?

The selected combination of answers is correct because it reflects situations that can impair a driver's focus and reaction time, which is critical for safe driving.

According to German traffic regulations, especially under the road traffic act (StVO), drivers must maintain full attention to traffic conditions. Stressful conversations can lead to cognitive overload, complicating decision-making. Driving in complicated traffic conditions requires undivided attention, and any distraction, including phone conversations—even hands-free—can lead to accidents.

The rule emphasizes that if a situation distracts you from traffic, you should refrain from using the telephone, regardless of whether it is hands-free. This is to ensure the safety of all road users.