The United States Postal Inspection Service was created to prevent . A. people from sending mail without proper postage B. the national mail system from being used for criminal or illegal purposes C. Protecting mail carriers from inadvertently delivering toxic material D. United States Marshals from policing the postal system It is B

B. the national mail system from being used for criminal or illegal purposes.

Explanation:

The United States Postal Inspection Service is a federal law enforcement sector of the posting service that inspects and makes sure that the mail system is used in a fair and safe manner. This process safeguards the general public from any harm and also ensures the mail system from any illegal or dangerous activity.

Thus, the correct answer is that the US Postal Inspection Service was created so that the national mail system will not be used for any criminal or illegal purposes and also to safeguard people from any harm.