The correct answer is D. To solidify the power of the Catholic Church
Step-by-step explanation
During the 15th century, Catholicism in Spain was in crisis because in the territory dominated by the Catholic kings of Castile there were small groups of converts to other religions. Also, Jews and Muslims had come from elsewhere who were spreading their religion. For this reason, the Catholic kings considered the adoption of the Inquisition as a measure to establish the unity of worship and maintain their total power over the kingdom since other kingdoms such as Aragon threatened their power. Therefore, the correct answer is D. To solidify the power of the Catholic Church