Distracted driving laws have been put in place due to scientific studies that have shown the dangers associated with

wireless technology.
ddt.
plastics.
vaccines.

The distractions are caused while driving by the use of wireless technology (texting in driving) which has been scientifically studied too.

Option A

Explanation:

Texting while in driving like reading, sending the messages seems to be more dangerous one. The wireless technology can be used by the human as the primary user through the network signal rather than the use of wires.

Technology when became wireless, became handy too. Since it became handy, people started to use even while driving and this became a threatening danger to the driving as part of distraction.

This has been well studied scientifically and has been kept in laws to be avoiding though not banned and is often punishable in some countries.