Answer:
d. cultural capital
Step-by-step explanation:
According to the information on the issue, it is correct to say that Lu's family is trying to increase its cultural capital, which can be understood as the set of skills related to the intellect that a person acquires through different experiences, such as new ones learnings of different languages, science, arts, etc.
Cultural capital is important in today's society, where globalization makes competitiveness much greater and accumulating intellectual knowledge can mean advantages for an individual when competing for a job position, for example.