What Is the Sociological Definition of Significant Others

What is the sociological definition of significant others?

A) specific people important in a child's life who have the greatest impact on her or his self-evaluation
B) relationships characterized by intense emotional ties,face-to-face interaction,intimacy,and a strong,enduring sense of commitment
C) our abstract sense of self that comes from society's norms and values
D) people of similar age and social standing that influence our norms and values