Why does the manual say to turn your phone off and put it out of reach rather than just ignoring it? · Q-0480

Why does the manual say to turn your phone off and put it out of reach rather than just ignoring it?

1. a Because the battery drains faster while driving
2. b Because a ringing phone is itself the distraction, whether or not you answer
3. c Because hands-free calls are illegal for all drivers
4. d Because reception is unreliable at speed

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