Read the text below and answer the question. "In many ancient cultures, extended families often lived together in large households, sharing responsibilities and resources. Today, especially in Western societies, nuclear families (parents and children) are more common, and individuals often move away from their hometowns for work or education, leading to more geographically dispersed families." Which of the following is a key difference between past and 21st-century family structures, as described in the text?
A) Past families had more children than modern families.