What is nationalism? a: loyalty to a group with whom one shares a common history, culture, and/or religion b: loyalty based on geographic location c: a sense of belonging that is based on a written document like a constitution d: a feeling of belonging to a group that is highly educated and wealthy

Salutations!

Nationalism is a feeling of love to one's country. Having the feeling of patriotism or love means a citizen from the same country, religion etc. Nationalism is widely felt in militaries, forces etc. From your following options, the correct answer is: a loyalty to a group with whom one shares a common history, culture and/or religion.

Thus, your answer is option A.

Hope I  helped (:

have a great day!

A: loyalty to a group with whom one shares a common history, culture, and/or religion

"We the people of the United States, in order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America".