If you need to stop on the shoulder of a road, you should put on your:

Flashers (4-way emergency lights).. Section 2.5: Activate your 4-way flashers immediately when stopping on the shoulder.

If you need to stop on the shoulder of a road, you should put on your:

ANSWER BREAKDOWN
  • A. Incorrect. "High beams." is not correct. Activate your 4-way flashers immediately when stopping on the shoulder.
  • B. Correct. Activate your 4-way flashers immediately when stopping on the shoulder.
  • C. Incorrect. "Left turn signal." is not correct. Activate your 4-way flashers immediately when stopping on the shoulder.
  • D. Incorrect. "Interior lights." is not correct. Activate your 4-way flashers immediately when stopping on the shoulder.