Answer:
The sentence that best summarizes a theme of "Bul-GO!-gi" is:
D. Mothers teach their children important lessons.
Step-by-step explanation:
The short story "Bul-Go!-gi" has as one of its themes the relationship between mothers and their children, and how mothers teach important lessons. That theme overlaps with the theme of cultural differences and clash. The main character is Ji-Suk. When she was young, Ji-Suk made sure to obey her mother and embrace Korean culture as well as American culture.
Ji-Suk's mother believed success means a high status job and academic accomplishments. However, now that Ji-Suk is older, she has quit everything else to become the owner of a food truck. The story makes it clear, nonetheless, that she is not throwing away the lessons her mother taught her. Quite the contrary, she keeps them dearly in her heart, but uses them to achieve her own dreams instead of her mother's.
Now, Ji-Suk is a mother herself, and she has a very different approach to raising her son. She gives him space to figure things out on his own. Sometimes, she asks herself if she is making a mistake, but the story also makes it clear that her style of mothering is working. Her son is indeed learning important life lessons from her, the same way she did from her mother.