In the Lateran Agreement, How Did Mussolini Resolve the Status

In the Lateran Agreement, how did Mussolini resolve the status of the Catholic Church in Italy?

A) The Vatican was recognized as a protectorate under the League of Nations.
B) The Catholic Church abandoned all of its political claims within Italy in return for a permanent church tax collected by the state.
C) The Vatican was recognized as an independent state that received heavy support from the Italian state.
D) The Catholic Church obtained tax and legal exemptions for Vatican City in exchange for recognizing Italy's claim over the city itself.