Which of the following is considered personal information?

The correct answer is identified as Social Security numbers, as these are explicitly classified as personal information. Personal information typically refers to data that can be used to identify an individual or involves sensitive details about an individual. Social Security numbers (SSNs) are unique identifiers used primarily in the United States to track individuals for taxation and benefits purposes. The unauthorized disclosure of SSNs can lead to identity theft and other significant privacy violations.

In contrast, trade secrets of a company, government classified documents, and company financial reports do not fall under the category of personal information. Trade secrets are proprietary business information that provides a company with a competitive edge and are not linked to personal identities. Government classified documents pertain to national security and are intended for official use only, lacking direct relevance to personal information. Similarly, company financial reports primarily concern corporate details and performance metrics and don't contain identifiable personal data about individuals.