The correct answer is B. Tan describes a realization she makes while with her husband to support the idea that nonstandard forms of English are important forms of communication.
Step-by-step explanation:
This excerpt belongs to the text "Mother Tongue" by Amy Tan, which describes her perspective about the English Language as her mother is from China, and due to this, the mother uses non-standard English when they move to the U.S. In the excerpt, Tan recognizes this form of English is not only used by her mother but also by herself "and I heard myself saying this: “Not waste money that way.” Also, she realizes this type of English is now an important and special form of communication "It has become our language of intimacy" not only because it is related to her childhood but because it is related to her family.
According to this, in the excerpt Tan develops the idea non-standard English is valid and part of herself as she realizes she uses this with her husband and family and it is an important form of communication (Option B).