In 1906, sociologist william sumner made the comment, "one's own group is the center of everything, and all others are scaled and rated with reference to it." this statement is most aligned with the concept of

Ethnocentrism

Explanation:

In sociology, the concept of ethnocentrism refers to the idea that one's own culture is better than any other culture. Therefore, people who are ethnocentric tend to judge other cultures from their own culture perspective.

It was actually William Sumner who first coined this term in 1906.

Therefore, the comment "One's own group is the center of everything, and all others are scaled and rated with reference to it" is most aligned with the concept of ethnocentrism since it makes reference to compare other groups with reference to one's own group.

the answer to your question is,

d. when a child was born.

-mabel < 3