D. Their.. Their is referring to more than one student. It is plural form. Hope this helps! :)
Jing-Mei's mother wants her daughter to become a prodigy because her friend Lindo Jong's daughter is a prodigy in chess. She is famous, and when seeing other prodigies in magazines and television, Jing-Mei's mother understands that she wants the same thing for her daughter. This generates in Jing-Mei certain displeasure, because she is tired of the comparisons and rivalry.
Jing-Mother understands that America is the land of opportunities, where anyone can succeed and achieve their dreams
Pizza roles because the amount of calories from the pizza rolls keep his stomach full.
People worked diligently to participate in the building of the American dream with the understanding they would profit.