What is nationalism?

Aan individualist state of mind in which a person believes that a nation-state is dependent on their taxes

Ba collective state of mind in which people believe their primary duty and loyalty is to the nation-state

Can individualist state of mind in which a person believes that a nation-state needs all its people to govern it

Da collective state of mind in which people believe that their nation-state must work in accordance with other nations in order to thrive