Final answer:
The United States Secret Service's main investigative function is not espionage.
Step-by-step explanation:
The subject of this question is Social Studies and it is at the High School grade level.
The United States Secret Service has a dual mission of protection and investigation. While the agency is primarily responsible for protecting public officials and preventing counterfeiting, its main investigative function is focused on financial crimes such as counterfeit currency, financial fraud, and cybercrime.
Therefore, the statement in the question that the main investigative function of the United States Secret Service is espionage is false.
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