Which of the following was a major step in reunifying the kingdoms in Spain?
One major step in reunifying the kingdoms in Spain was the marriage of Ferdinand of Aragon and Isabella of Castile. This union, which took place in 1469, created a strong alliance between the two most powerful Christian kingdoms in Spain at that time.
To find this answer, one can search for information about the reunification of Spain. Start by searching for keywords like "reunification of Spain" or "unification of Spain." This will lead you to historical events and factors that played a significant role in bringing the kingdoms together. By examining these events, you can identify the crucial steps that contributed to the reunification of Spain, such as the marriage of Ferdinand of Aragon and Isabella of Castile.