Correct Answer is D. That people learn to use their MP3 players safely, without endangering themselves or others.
Pretty Sure that is right.
The answer is B. Tan is presenting the example <em>"limited English"</em>, which is just <em>one of many</em> other terms she heard before, to express how bad they seem. Because, when people deem those whose knowledge of the Mother Tongue <em>is not as the native speaker</em>, therefore is limited, they are defining everything as limited, even their speaking perceptions.