Question

what is one of the primary reasons the nationalist revolutions of 1848 like italy failed?

lack of discontent with the monarchs in charge at the time

inability to acquire weapons

disunity among the revolutionaries

rewatch

Explanation:

The nationalist revolutions of 1848 in Italy faced multiple challenges. There was significant discontent with monarchs (so the first option is incorrect). Weapons acquisition was not the primary downfall. However, disunity among revolutionaries (different goals, lack of a unified front) was a major issue. For example, different regions and groups had varying ideas about the future of Italy - some wanted a republic, some a constitutional monarchy, and there were also differences in how to achieve national unification. This internal division weakened their collective efforts against the existing order (monarchies and foreign powers like Austria which had influence in parts of Italy).

Answer:

Disunity among the revolutionaries.