Question

you might see a deer before it becomes a problem if you do what?
if you scan the road far ahead
if you imagine deer crossing the road
if you watch the hood of your vehicle

Explanation:

Scanning the road far ahead allows you to spot wildlife like deer early, before they enter your immediate driving path and create a hazard. Imagining deer or only watching your vehicle's hood does not help in actually detecting them in time.

Answer:

A. if you scan the road far ahead