Which act was enacted to protect the privacy of customer financial information?

The Graham-Leach-Bliley Act is the correct choice as it was specifically enacted to protect the privacy of customer financial information. This act mandates that financial institutions must establish privacy policies that inform their customers about how their personal financial information is collected, used, and shared. It also requires institutions to safeguard sensitive data to ensure that customers' financial information is not disclosed improperly.

This legislation is crucial in the context of financial services as it aims to protect consumers by preventing unauthorized access to their sensitive financial data, which can lead to identity theft and fraud. The act also empowers consumers with the right to opt-out of having their personal information shared with non-affiliated third parties, giving them more control over their financial privacy.

In contrast, the other acts mentioned do not focus specifically on financial privacy. The Electronic Communications Privacy Act primarily addresses the interception of electronic communications, the Digital Millennium Copyright Act mainly deals with copyright issues in digital context, and the Family Educational Rights and Privacy Act focuses on the privacy of student education records.