I want to know the answer to the following question:
During what period was the importance of having an Italian national language raised?
All the background I'm provided with is that "With the unification of Italy in the 1860s, standard Italian became the official national language of the new Italian state, while the various unofficial regional languages of Italy gradually became regarded as subordinate "dialects" to Italian, increasingly associated negatively with lack of education or provincialism.". Is that enough to answer the question?