Final answer:
The more recent document applies in cases of conflicting information in USP.
Step-by-step explanation:
In the context of the question, the subject is Social Studies.
When information in USP (United States Policy) conflicts, the more recent document applies. This means that if there are two documents with conflicting information, the document that was issued more recently would take priority. For example, if there is a policy document from 1990 and another one from 2005, the 2005 document would be considered the more effective application of the policy of containment.
In a hypothetical policy duel, where the goal is to determine the more effective application of the policy of containment, the more recent document would be the winner. This is because it would reflect any new developments, changes in strategy, or updated information that may not have been available when the older document was created.