Which component is typically included in an SOP's revision history?

• A. The weather on the update date.
• B. The color of the paper.
• C. The organization's annual report.
• D. Version number, date of update, author, and summary of changes.

Answer: (D)

Revision history in SOPs is about tracking changes to a document over time, including who made the changes, when they were made, and what specifically was altered. The best answer lists the version number, date of update, author, and a summary of changes because that information provides clear traceability and helps users know which version they’re using and why it was updated. The other items—weather on the update date, the color of the paper, and the organization’s annual report—don’t reflect edits or approvals and don’t help identify the current or previous versions, so they don’t belong in a revision history.