What causes inattention blindness?

a) drivers cannot see something that happens in front of them because it happens too quickly.
b) drivers cannot see because they are too busy doing something else.
c) a person takes his or her eyes off the road while doing another task.
d) the brain cannot process what is seen because a person is too distracted by something else.

The cause for inattention blindness is that the brain cannot process what is seen because a person is too distracted by something else.  Thus the correct answer is option D.

Explanation:

There are various accidents that happens on road due to the inattentional blindness of the driver. Due to road accidents, in USA there are much loss of lives every year. There are many and is held responsible for the intention of drivers.

But the root cause of the inattentional blindness is that the person is suspected by doing something else rather than focusing on the steering and road ahead of him. And this is the reason due to which inattentional blindness occur while driving.