In Paragraph 4, what is meant by the term “group identity”?

A
The designated leader of a group of people
B
The commonalities shared by a group of people
C
The way other people perceive a certain group of people
D
The expressed purpose/goal of a group of people

Can someone explain this to me clearly plz

Fine fellow, that lebrun," said arobin when robert had gone. "i never heard you speak of him.""i knew him last summer at grand isle," she replied.  what becomes apparent during this conversation? robert and arobin are both aware they are rivals for edna’s affections. arobin is unaware of robert’s role in edna’s life, but robert is aware of arobin’s role. robert is completely unaware of arobin’s romantic intentions and love for edna. robert has much more confidence in himself than arobin does.

What does atticus do that makes mayella ewell think that he's making fun of her? what does this show us about mayella's life?