To solidify spain's unification, what did king ferdinand and queen isabella do? they refused to sponsor voyages of exploration. they joined with the moor leadership to bring about harmony. they returned gold to indians in the western hemisphere. they required jews and muslims to convert to catholicism. they banned the protestant faith in spain.

They required jews and muslims to convert to catholicism.

Explanation:

Queen Isabella and King Ferdinand were the first kings to unify what is now Spain. The kings were responsible for bringing together the first territories of what would later constitute this country. However, in order to solidify this unification, Isabella and Ferdinand implemented several laws intended to reduce cultural and religious differences between various regions. Part of their plan consisted in converting Jews and Muslims to Catholicism.

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