LargePersonGroup and LargeFaceList are collectively referred to as large-scale operations.
LargePersonGroup can contain up to 1 million persons, each with a maximum of 248 faces. LargeFaceList can contain up to 1 million faces. The large-scale operations are similar to the conventional PersonGroup and FaceList but have some differences because of the new architecture.
References:
https://docs.microsoft.com/en-us/azure/cognitive-services/face/face-api-how-to-topics/how-to-use-large-scale

The customer's wire transfers to high-risk jurisdictions and the large volume of activity with low month-end balance are two facts that should be considered during the course of an investigation into possible money laundering. These facts may indicate that the customer is trying to move funds from or to countries that have weak anti-money laundering (AML) controls, or that are known to be a source or destination of illicit funds12. They may also suggest that the customer is using a technique called "smurfing" or "structuring", which involves breaking down large amounts of cash into smaller transactions to avoid detection or reporting34. The other two facts are not necessarily indicative of money laundering, as the customer may have a legitimate reason to have a long-standing account at the bank or to be on the exempt list for currency transaction reporting requirements.
References: 1: FFIEC BSA/AML Examination Manual, Appendix F: Money Laundering and Terrorist Financing Red Flags, Geographic Concerns, 5; 2: AML Red Flags - What are the Top 10 Indicators?, ComplyAdvantage, 6; 3: FFIEC BSA/AML Examination Manual, Appendix F: Money Laundering and Terrorist Financing Red Flags, Transaction Has Unusual Features, 5; 4: Money Laundering Red Flags | Key Behaviours and Indicators, High Speed Training, 7.

Explanation
According to the CAMS manual 6th edition, the USA PATRIOT Act allows the US government to subpoena documents from foreign financial institutions (FIs) that have no presence in the US (option B). The manual states that "The USA PATRIOT Act provides US law enforcement agencies with the power to subpoena documents from foreign banks that maintain correspondent accounts with US banks or have no presence in the United States" (p. 77).