Which of these is the most useful step in a plan to prevent personal injury?
a. only go to parties that serve alcohol.

b. encourage drivers to smoke moderately while driving.

c. avoid discussing issues of personal safety with friends.

d. state how you feel about impaired driving before getting in
someone's vehicle.

Explanation:

I believe the best answer here would be D.  State how you feel about impaired driving before getting in  someone's vehicle. If you state how you feel about a situation like this and if you are/are not comfortable with it, you are developing a way to avoid personal injury.

D: state how you feel about impairs driving before getting in someones vehicle

Explanation:

answer; the correct answer is medical care service field;