The correct answer is A) visual overload.
While driving in the city, the busy urban environment can induce visual overload.
When you are driving your car, one of your senses probably experiences over-stimulation from the environment. That is called sensory overload. Among the elements that cause this visual overload are advertising signs, urbanization, the noise, and people on the streets. That is why it is very important to focus on driving, and do not allow or minimize distractions.
The other options of the question were B) mental focus, C) road racing, and D) signage.