An Example of Assimilation Would Be Which of the Following

An example of assimilation would be which of the following?

A) A young man who immigrated to the United States from Japan speaks English but also meets weekly with a group of Japanese Americans to eat traditional Japanese food.
B) A group of students at a local college start a club for immigrants from South Korea.
C) A family from Mexico moves to the United States and adopts mainstream U.S. cultural practices but at the same time loses many of its Mexican cultural practices.
D) After immigrating to the United States, a young woman from China adopts some American cultural practices but still closely identifies with her country of origin.