If you mean the book "I am nit your perfect Mexican Daughter" by Erika L. Sánchez. Then she would be in cultural conflict with her traditional Mexican family.
A, A mango seed - it would take a while to grow just like Mingora - it would take a while to rebuild but she was hopeful for a peaceful rebuilding
A. "Whom" is an object pronoun is actually the only one that is correct. This is because for B. whom could be an object of a preposition if it was in a sentence with "to whom". For C., who is only a subject pronoun. If it were an object pronoun, a sentence would be like this: "To who does the present go to?".
"<u>That</u>" is the demonstrative adjective.