The answer is C. She wants to preserve her family’s Mexican culture even though she no longer lives in Mexico.
Step-by-step explanation:
In the excerpt presented, the narrator describes the ideas his grandmother has about the job he should have and the type of woman he should marry. In this, it is revealed the grandmother wants his grandson to become a barber, and also she opposes he marries an "Okie" or a woman that is not Mexican, this shows the grandmother resist part of the new culture and she aims at preserving her family's Mexican culture which explains she does not want influences from other cultures. This also means she does not necessarily hate American culture but she just opposes someone that is not Mexican becomes part of the family including Italians, Asians, French, etc. and not only Americans. Therefore, it can be inferred the grandmother "wants to preserve her family’s Mexican culture even though she no longer lives in Mexico".