Was considered to be an early exception to the assimilationist approach to white ethnic groups.

"The principle of third generation interest" The principle of third generation interest.

Marcus Hansen's  guideline of third generation interest was an early exception to the assimilationist approach to White ethnic groups. In simple words expressed, Hansen kept up that in the third era, the grand kids of the first immigrants, ethnic intrigue and mindfulness would really increment. As indicated by Hansen, ‘What the son wishes to forget, the grandson wishes to remember'  

the answer is a. monarch

answer; /// you data to develop general ideas or theories;