Setting your phone to Do Not Disturb allows you to focus completely on the road hear the radio more clearly drive faster focus completely on conversation with passengers

## Step 1<br />The problem is asking us to identify the primary reason for setting a phone to "Do Not Disturb" mode while driving. The options provided are:<br />- Focus completely on the road<br />- Hear the radio more clearly<br />- Drive faster<br />- Focus completely on conversation with passengers<br /><br />## Step 2<br />We need to consider the context of the problem, which is about driving. The primary concern while driving is safety, and the goal is to minimize distractions that could lead to accidents.<br /><br />## Step 3<br />The option "Focus completely on the road" aligns with the primary concern of safety while driving. By setting the phone to "Do Not Disturb", the driver can concentrate fully on the road, which is the safest option.<br /><br />## Step 4<br />The other options, such as "Hear the radio more clearly", "Drive faster", and "Focus completely on conversation with passengers", are not the primary reasons for setting the phone to "Do Not Disturb". These options could potentially lead to distractions or other safety issues.