The correct answer is D) The church no longer allowed secular rulers to choose the pope.
A reform the church made during the eleventh and twelfth centuries was "The church no longer allowed secular rulers to choose the pope."
In the 11th century, the Church suffered from the Great Schism that divided Christians in two: the Roman Catholic Church or Western Church, and the Orthodox Church or Eastern Church. The first stated in Rome while the other went to Constantinople. Later, during the 12th century, there were some reforms in the Catholic Church while the Second Crusade was fighting to defend the sacred land of Jerusalem.