I want to know the answer to the following question:
Along with Aragon and Castile, what Christian kingdom was present on the Iberian Peninsula?
All the background I'm provided with is that "Strong, royalty-based nation states rose throughout Europe in the Late Middle Ages, particularly in England, France, and the Christian kingdoms of the Iberian Peninsula: Aragon, Castile, and Portugal.". Is that enough to answer the question?