Which of the following statements is true regarding "Contained in" classification?

The statement that "Contained in" classification applies when aggregation of unclassified data causes a document to become classified is accurate. This concept acknowledges that while individual pieces of data may be unclassified, their combination or aggregation may reveal sensitive information that warrants classification. Therefore, if the accumulation of this information leads to the potential release of classified data or sensitive national security information, the result is a document that requires classification.

This principle is essential in ensuring that sensitive information is properly protected, as even seemingly innocuous unclassified data can become classified due to the context or manner in which it is assembled. Understanding this concept helps individuals tasked with derivative classification to accurately assess the classifications needed based on the culmination of various data points.