Answer:
C. Downhill slope
Step-by-step explanation:
Scanning's a good driving technique that prevents us from having a traffic accident. In order to be alert of what's happening and could possibly happen, a driver must always pay attention to his/her sorroundings by using the mirrors of the vehicle, looking a long distance ahead, checking the sides of the road for any unforeseen event and keeping the blind spot in mind. In the example, the only factor that doesn't test the driver's attention is a downhill slope.