Can using a mobile phone with a 'hands-free' system while driving affect the driver's ability to pay attention?

A)No, using a mobile phone has no effect whatsoever on the ability to pay attention.
B)Yes, it is easier to maintain attention on driving.
C)Yes, it is difficult to maintain adequate attention while using the phone.Correct
While driving, it is prohibited to use a mobile phone manually due to the danger it poses. However, it is important to be clear that the use of hands-free devices also carries risks, as their use equally prevents us from maintaining adequate attention while driving.