Target area range is a survey of what lies about seconds ahead of the vehicle. a. 5-10 b. 10-20 c. 20-30 d. 40-50

Option B, 10-20

Explanation:

In a target area survey, a target object is fixed some 12 to 20 seconds ahead of any moving vehicle and that too at the center of the travel path. The region between a target area and the vehicle is called target area range. A target can be any other vehicle, road side traffic signals, stationary objects etc.  

i think the answer is b.