The most important factor in the rise of Spain as a major European power was:

Question

Quizplus · Accepted Answer

The unification of the kingdoms of Aragon and Castile was the most important factor in the rise of Spain as a major European power. This alliance enabled Spain to become a strong centralized state and develop a powerful navy, which allowed it to expand its influence overseas, most notably in the Americas. The other options, while significant in their own right, do not have the same degree of impact on Spain's emergence as a dominant power.

The Most Important Factor in the Rise of Spain as a Major