And sure enough, the following week there we were in front of this astonished stockbroker, and I was sitting there red-faced and quiet, and my mother, the real Mrs. Tan, was shouting at his boss in her impeccable broken English.

What can be inferred from the excerpt?
Nonstandard forms of English can be as effective as the standard form of English.
Nonstandard forms of English limit a speaker’s ability to stand up for herself.
Nonstandard forms of English make communication difficult between cultures.
Nonstandard forms of English are used more by older adults than by younger adults.