Pocket trash, business cards, and receipts are examples of what?

The correct response is that pocket trash, business cards, and receipts are possible information from an alien, but not intelligence information. This concept is important as it highlights how seemingly mundane items can provide insight into an individual’s activities, associations, or intentions, particularly in immigration and customs contexts. These items can reveal patterns of behavior or connections to other subjects, even though they may not constitute formal intelligence.

These types of artifacts often serve as leads that can guide investigations or provide context for further probing into a subject’s connections. They represent unstructured but potentially valuable information gathered during encounters. Understanding the nature of this information emphasizes the importance of thorough examination and the collection of a wide range of documents and items during investigations, as they can lead to relevant findings regarding an individual's background or activities.

The other options address different aspects of intelligence and evidence collection, but they do not accurately reflect the nature or purpose of pocket trash, business cards, and receipts in the context of the question, which specifically focuses on the kinds of information they may provide in an immigration or customs investigation.