Choose the word that best fits the blank space in the following passage.

The majority of families in Vietnam are (11)__________ families, where three or more generations live in the same house and take care of each other. Extended families look similar to a mini society, in which the most elderly have the strongest voice and are (12)_________ for most activities in their house. The younger generation shows respect for the older generation and vice versa, the old generation tolerates the young. The children are expected to ask for their parents' views on their activities or plans. As a member of family, one person receives both moral and material (13)_____ from other members, particularly when he or she is in trouble. Vice versa, he or she is expected to help other members in his or her family when they are in need. In general, families are expected to be a source of comfort , where every member may feel (14)_________ when getting together. However, the findings from a recent study show that these days, more newly-married couples in Vietnam choose to live in a nuclear family. They would prefer to obtain privacy in their family life and to avoid possible (15)_________ when different generations live together.

A. nuclear

B. small

C. extended

D. large