Answer: d. Young people today define adulthood in terms of abstract traits like self-reliance and happiness.
Step-by-step explanation:
Furstenberg's work has focused on social change, the transition to adulthood, divorce, and intergenerational relationships. He explains that in the present, young people have a definition of adulthood that is more extensive than in the past. Instead of the achievement of distinct goals, such as the homeownership of a house, young people today define adulthood in terms of abstract traits such as self-reliance and happiness.