Text: 'Traditional family structures often involved extended families living together, with multiple generations sharing a household and responsibilities. In contrast, the 21st century often sees a prevalence of nuclear families, where parents and their children live separately from grandparents and other relatives. This shift has impacted social support networks and childcare arrangements.' Which statement does not accurately reflect a difference between past and 21st-century family structures based on the text?
A) Past families typically had more generations living under one roof.