The correct answer is C) the values, traditions, identity, and visions of a nation.
National ethos refers to the values, traditions, identity, and visions of a nation.
This means that every nation has been the result of the culture, customs, values, history, and belief systems of its people throughout the years. And these elements are what create the true identity of the people who live in the country. It allows these citizens to distinguish themselves from other nations and makes them unique. Sometimes these aspects turn into patriotic ideas and nationalist sentiment for the love of the country and what this country represents for them.