Final answer:
The safest time to post vacation details on your social networking profile is after you have returned home.
Step-by-step explanation:
The safest time to post details of your vacation activities on your social networking profile is c) After you have returned home from your vacation.
Posting vacation details while you are on your vacation or immediately before you leave can pose a safety risk. It may indicate that your house is empty, making it a potential target for thieves. Additionally, sharing personal information such as your location in real-time can compromise your safety.
By waiting until after you have returned home, you minimize the risk of attracting unwanted attention and ensure that you have already taken necessary precautions to protect your property and personal safety.