The belief that national interests as a whole should be moreimportant than what one region wants or the interests of other countries *
Sectionalism
Nationalism
Regionalism
Abolitionism

Nationalism.

Explanation:

Nationalism can be defined as a belief that national interests as a whole should be more important than what one region wants or the interests of other countries.

The aforementioned belief is a foreign policy based on the principles of "Nationalism" and it was established by the former Secretary of State and 6th President of the United States of America known as John Quincy Adams.

In his inaugural speech, he promised the people of the United States of America that he would be upright and have a pure intention, as well as being devoted to the welfare of the country at large.

B.

Explanation:

The Talented Tenth is an essay written by WEB Du Bois. The essay was written when Theodore Roosevelt was President of the United States and the nation was witnessing the rise of industrialization.

WEB Du Bois considered it to be the best time for African Americans to grow.

He asserts that there is one in the ten African Americans who have developed the quality of leadership through education, writing books, and being an active participant in social change.

The term 'best of this race' is referred to this Talented Tenth of African American who can lead the mass away from lack of education.

Therefore, option B is correct.