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meaning of INSULAR as used in the passage?

“Sociologists and linguists probably will tell you that a person’s developing language skills are more influenced by peers. But I do think that the language spoken in the family, especially in immigrant families which are more insular, plays a large role in shaping the language of the child.”

Question

Halp!! will medal and fan 

meaning of INSULAR as used in the passage?

“Sociologists and linguists probably will tell you that a person’s developing language skills are more influenced by peers. But I do think that the language spoken in the family, especially in immigrant families which are more insular, plays a large role in shaping the language of the child.”

anonymous · Answer

A.
Amy Tan uses the word insular to describe that immigrant families can be more isolated and can affect the way a person’s language develops.
B.
Amy Tan uses the word insular to describe that immigrant families come from islands where language is different.
C.
Amy Tan uses the word insular to describe her mother’s “broken” English.
D.
Amy Tan uses the word insular to describe what sociologies and linguists believe about language development.