The Computer Fraud and Abuse Act (CFAA) is primarily concerned with computer-related offenses, including unauthorized access to computer systems and data.
Out of the options provided, the behavior that would be protected under the CFAA is:
• a person in another state accessing their bank account
This is because accessing one's own bank account online, assuming they have authorized access, would not constitute unauthorized access under the CFAA. The other behaviors, such as illegally downloading a song or posting negative comments on social media, do not fall under the protections of the CFAA. The company advertising online to children could be subject to other laws (like COPPA), but it is not directly related to the CFAA.