Nationalism is devotion and loyalty to one's country.
Option (d);
EXPLANATION:
Nation refers to a country and nationalism is the devotion towards one country. It refers to patriotism, which means a person would provide entire support for his country and its interests.
For the person, the country is above all. This nationalism provides interest for individuals in one nation and it increases the interest level as the superior demand in gaining the power of self-government in that nation.
The re-emergence of Persian culture by Jewish revolutionaries during the period of Sassanid is one of the examples of nationalism.