Why does the manual say mental distractions are as dangerous as taking your eyes off the road?
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A.
Your grip on the steering wheel slackens without you noticing.
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B.
Your peripheral vision narrows by about half within seconds.
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C.
Your eyes can gaze at objects in the driving scene but fail to see them. Correct
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D.
Your hearing weakens whenever you concentrate on other thoughts.
The answer is "Your eyes can gaze at objects in the driving scene but fail to see them."
The manual explains that your eyes can gaze at objects in the driving scene and still fail to see them when attention is elsewhere. Drivers who pick 'peripheral vision narrows' are borrowing the tunnel-vision warning from speed and stress content, but the manual's danger with mental distraction is attention, not the size of the visual field.
The traps in the wrong answers
A. Your grip on the steering wheel slackens without you noticing.
The manual pins mental distraction on attention, not muscle tone; steering grip is not the reason it gives. This answer turns a cognitive danger into a physical one, borrowing from drowsy-driving cues the manual keeps separate.
B. Your peripheral vision narrows by about half within seconds.
The manual does not tie mental distraction to a shrinking visual field; the risk it names is failing to see what your eyes are already pointing at. This answer borrows the tunnel-vision warning from speed and stress guidance and pastes it onto a different problem.
D. Your hearing weakens whenever you concentrate on other thoughts.
The manual does not describe a hearing effect; the failure it names is visual attention, not audio processing. This answer invents a hearing-loss claim, filling in a general 'senses dull' rule of thumb the manual never states.
This question tests your knowledge of Distracted Driving in Texas. Source: Texas Driver Manual, "Distracted driving," p.53..
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