Final answer:
The act of locking car doors while driving is a precautionary measure for safety, and although it does not directly relate to the scenario of returning home provided in the context, it is an independent true statement if it is the habit of the individual concerned for their personal security.
Step-by-step explanation:
In response to the statement about the precaution of locking car doors while driving, it does not directly relate to the subsequent information provided about returning to an apartment. The additional context given revolves around personal safety and vigilance when one is approaching their home, especially late at night. While both the act of locking car doors and being alert to one's surroundings at night are safety precautions, they address different scenarios. The locking of a car door is a proactive measure to ensure personal safety and security while driving, whereas the detailed scenario is about coming back to one's apartment and feeling nervous due to footsteps heard behind, finally feeling relief after being safely inside. The statement about locking car doors, therefore, stands as true as a separate assertion and does not require the given context to be evaluated; if it is a habitual action taken for safety, then it is true for the individual making that statement.