Final answer:
D) All of the above. Pedestrians should walk when facing the walk signal, avoid entering the roadway when facing the don't walk signal, and stop crossing if the don't walk signal constantly lights up.
Step-by-step explanation:
Regarding traffic signals and walk lights, pedestrians should:
- Walk when facing the walk signal.
- Avoid entering the roadway when facing the don't walk signal.
- Stop crossing if the don't walk signal constantly lights up.
Therefore, the correct answer is D) All of the above.