Final answer:
Posting a picture on a social network may make it searchable by the public through search engines, affecting your online reputation and future opportunities.
Step-by-step explanation:
When you post a picture on your social networking site, the potential consequence that exists is c) It may become available to the public through search engines. This is because anything that is uploaded to the internet can potentially be indexed by search engines, thereby making it accessible to a wider audience than just friends and family. Additionally, content shared can remain on the internet for a long time, even after attempts to delete it. It is important, therefore, to be mindful of the long-term impact of what you post, as it could affect future college admissions, job prospects, and your overall online reputation. Always consider your online privacy and the professional image you present when engaging in social networking.