Hello, you have not presented your answer options. However, when searching for your question on the internet, I was able to find another question exactly like yours that had the answer options. In that case, I hope the answer below can help you.
The correct options are: "to define the other," "to reveal the speaker" and "to control circumstances."
According to the sentence shown above, language has the role of defining the other because the sentence shows that a black speaker is defined by the type of language he emits, however, this language is imported by the white speaker, who determines what is allowed or not.
Language also has the power to reveal the speaker because black speakers who use Black English will be victims of intolerance and repression by white speakers who disregard Black English as a language.
Finally, language has the duty to control circumstances because language must be used to determine the reality in which each individual lives. When a black speaker is prohibited from using the kind of English that determines his reality, he is prevented from relating the language to his personal life.