The appositive phrase is not Maya Lin, like the comment above me stated, but it is B) Chinese-American.
An appositive phrase is usually separated from the rest of the sentence by commas, and it describes the subject, which here is Maya Lin.
A Few Examples
-The king refused to assess law regarding immigration
- Raising condition of new appropriation land
- the king would not allow the court of justice to be established
<span>There are a few reasons that Grendel attacks the men in the mead hall in</span>