Why Did the Founding Fathers Incorporate the Principle of Privileges

Why did the Founding Fathers incorporate the principle of privileges and immunities into the Constitution?

A) To guarantee that the national government provide equivalent shares of grant money to states
B) To ensure that state governments would not discriminate against another state's citizens
C) To safeguard that a person charged with a crime in another state be returned to that state for trial or imprisonment
D) To ensure that the public acts, records, and civil proceedings of each state are legal and binding in all states
E) To guarantee that public officials would receive equal treatment under the law