What is a major difference between nuclear and extended families?

• A. Nuclear families are more common in urban societies, whereas extended families are more common in rural societies
• B. Nuclear families consist primarily of parents and children, whereas extended families include additional relatives
• C. Nuclear families are based on legal marriage, whereas extended families are based only on blood relationships
• D. Nuclear families live in separate households, whereas extended families always live in the same household

Answer: (B)