Which of the following is the most high-risk scenario?

(1 point)
• Jim e-mails his friends several times a week.
• Jenna posts pictures of the homecoming dance on her website.
• Tina texts her friend with her address when inviting her to come over.
• Mark posts his e-mail address to gain access to a dozen online gambling sites.

Mark posting his e-mail address to gain access to a dozen online gambling sites is the most high-risk scenario. This can potentially expose him to scams, viruses, and other cyber threats associated with online gambling sites.